v2.1.5 (2014-02-19)
- fixed support for animations for charts with null values
- added support for null values (avgOverNulls: false) in line charts
- changed stepAnimation by adding the "active" parameter to be enabled, otherwise ignored (Issue #35)
- fixed stepAnimation to not be enabled if stepAnimation is declared to false (Issue #35) 
- rewritten the update logic to work even without animation manager and to deal with partial updates (Issue #36)
- fixed labels visibility un update (they were hidden but never made visibile on update if needed) 
- fixed legend rewriting/updating (Issue #38)
- fixed support for roundedCorners in legend "dots" (adding support for "rounded rects" svg paths and fixing move method for 'Q').
- fixed tooltip visiblity when some tooltip value is missing (compared to number of the serie values) (Issue #37) 
- updating values now recompute width/height and correctly adapt the paper and chart to the new size.
- separate computed width from option.width (so empty width is correctly applied on update): plugins should now use env.width instead of env.opt.width.
- added support for rPerc (radius expressed in percentage of available space) for pie charts.
- changed pixelWorkAround to be enabled only on SVG (to be verified)
- fixed tooltip (and mouse) management in IE compatible mode (Issue #10)
- fixed erros when using "legend: false" or legend without margin definitions (Issue #14)
- added support for valuesPalette and seriesPalette feature to automatically assign colors starting from a cycling palette (Issue #9) 
- added support for single value coloring in bar charts (each column can be printed with a different color)
- added caching for internal properties "inheritance" computation (enabled by default, disable by setting enableInternalCaching to false)
- added "margins" support to pie chart and fixed cx/cy usage (cy was ignored in favor of cx only) (Issue #31)
- rewrote "color" property inheritance to better deal with mixed line/bar charts, chart updates, have better performances and pie support (Issue #33)
- rewrite "legend" properties management to simplify code (should not change the behaviour)
- added "clear" method to featuresmanager so that features can be properly react to chart "clearing" (Issue #32 hint by pduval@github)
- bar chart: inherit stroke color from serie color if not specified (Issue #30)
- fixed width computation for mouse areas using mousearea: "index" option
- added "barOverlapPerc" property to allow overlapping of columns for the same X in different series
- update old copyright year references to 2010-2014 

v2.1.4 (2014-01-14)
- fix compatibility with RaphaelJs 2.0+: .rotation attribute is no more available so axis titles were not rotated (Issue #27)
- fix compatibility with jQuery 1.9+: $.browser.msie no more available. Switched to Raphael.VML, with the hope this was the intended check (Issue #28)
- fix compatibility with Raphaeljs 2.0+: animations didn't work due to animateWith signature/behaviour changes (Issue #23)
- fix for colors propagation from defaultSeries to single serie (Issue #11)
- added "auto" modes for labelsAnchor and labelsPos so that most use cases it will simply set sensible values for them based on labelsCenter/labelsRotate
- added support for labels hiding (for overlapping and *horizontal* overflow) also for rotated labels 
- various fixes for x labels. (mostly rewrote axis labels handling)
- fix for "grid.nx" values when nx < ny and they are not "auto" (Issue #13)
- highlight: improvement in stepAnimation management and overlayprops.
- added support for function as tooltip value

v2.1.3
- changed default value to "false" for axis.labels
- changed default value to "false" for series.dot
- changed default value to "false" for features.grid.draw
- changed default value to "4" for features.grid.ny
- changed default value to "false" for features.grid.forceBorder
- changed default value to "4" for features.legend.dotR
- added support for command execution via $.chart("COMMAND"). Supported commands: config, clear
- added support for null values in line charts (displayed with an average of near points)
- added series.dotShowOnNull and series.mouseareaShowOnNull (default to false) to support null values and what to do with them
- added features.grid.evenVProps, evenHProps, oddVProps, oddHProps to display grid bands
- added offset tooltip option
- added support for "style" option
- highlight: added support for scale with dots, optimized scale properties to have only one numeric value (not array)
- better configuration handling for templates and subsequent calls
- fix in config colors normalization
- better handling for values and labels (support for null/empty labels)
- fix for labels overflow on X axis
- pie chart: fixed support for serie.r < 0
- fix for tooltip color/frameProps settings where specified with shortcut "serie.color"
- line chart: fixed line chart not rounded
- legend: fixed a lot (was broken in almost all configurations...)
- line chart: changed the way labels are drawn and spaced on x axis (fix for labelsHideCovered)

v2.1.2
- support for series.empty.tooltip e series.empty.label
- refactoring object visualization phase
- support for "zindex" property, to set the order of the object. It should be specified in every "*Props" settings, like a SVG Attr
- default zIndex for dots in line chart is "5" (so dots are shown above other objects)
- fix #6: Using a simple line chart with a single serie and a single value in that serie breaks elychart.
- cleanup
- fix transitions

v2.1.1
- REFACTORING: true modular management, code split in several components
- script to build library in single form and in minimized single form
- fix rendering errors
- fix highlight in hidden paths
- fix color management in line chart
- support for "valueThresold" option in pie chart
- fix drawing 360 degrees pie slice
- improvements in anchorManager for bind support (fix when transitions occours)
- fix manager tooltip
- line chart: support for rounded : Array, to set a different method of rounding ( [#, 2] is for method suggested by Bago )
- fix in number precision and sharpening for axis min/max and label calculations [#4]
- fix in reg animation with only 1 value
- fix in label rendering when hiding all series and re-showing one [#1]
- fix in funnel highlight animation [#2]
- code cleanup
- fix in line generation for series with only one value
- moved option labelsCenter to features.grid.labelsCenter
- support for features.mousearea.indexCenter (bar|line|auto). Improvement in serie.lineCenter and features.highlight.indexHighlight, features.grid.labelsCenter (both suppors "auto" value)
- fixes in reg animation
- fix empty pie animations
- added option serie.tooltip.active