*** version 2.2 ***
added copy constructor
HTML class browser
C implementation uses Tcl internals only
added fifo and lifo example implementations
*** version 2.1 ***
C implementation can optionally use Tcl internals for higher speed
added C implementation of new, delete and classof
runtests uses Tcl 7.5 interp command if available instead of exec
*** version 2.0 ***
added multiple inheritance
added classof RTTI operator
added full HTML documentation
added graphical demo using composite pattern
removed delete operator class parameter
*** version 1.0 ***
For Tcl 7.5.
Based on tkpiechart verion 2.0 oop.tcl
