Version 0.4.0
	general:
		port to python3

Version 0.3.1
	general:
		Disable by default datacenter
	plot:
		Change default plot size
		Use tight_layout
		Improve detection of AM/PM dates
		Allow to plot only the 2nd plot (NSB vs datetime)
		plot.py now works also as a standalone tool (with user provided data file path).


Version 0.3.0
	general:
	    Added datacenter support


Version 0.2.2
	general:
		Adopt v1.0 of the standard format
		 (including the filename for the daily data and plots)
	read:
		put the rx,cx and ix data in the header
	plot:
		Change de Serial number label		
		

Version 0.2.1
	read:
		Print the errors in make_plot call on screen.
	plot:
		Only print the PM/AM/Moon labels on one panel.
		Print the SQM serial number.

Version 0.2.0
	general:
		Deep changes to make the program more modular.
		The program now can be packaged as a single .exe file with PyInstaller.
		The program can also be packaged for Linux systems.
	read:
		Try to use the fixed device address before looking for it automatically
		 this should allow the use of multiple devices in a single computer.
	plot:
		Code cleanup.
		Use local date/time in plots.
		Write statistics file.
		Use pyephem to calculate the moon phase (more accurate).
		Show the Moon max altitude (transit altitude or culmination).
		Plot the astronomical twilights.
		Object Oriented programming.
	email:
		Now the program can be distributed without email module.

Version 0.1.X
	read:
		Variables moved to config file.
		Clean-up of the code.
		Improve device reset.
		New read software. OO programing.
	plot:
		Variables moved to config file.
		Renamed from plot_sqmle.py to pysqm_plot.py
		Make the code and linebreaks less ugly
		Fixed axis.
		Moon phase plot.
	email:
		Renamed from email_sqmle.py to pysqm_email.py  

Version 0.0.X
	First version.
