*** version 6.2 ***
added pie::labelSlice{} and pieLabeler::label{}
*** version 6.1 ***
successfully tested with Tcl/Tk 8.3
uses stooop 4.1
*** version 6.0 ***
uses empty name array feature in internal code, which improves
  performance significantly
only works with stooop version 4.0.1, tcl version 8.2, or patched core
  (see stooop distribution PATCH file)
*** version 5.4 ***
added pie::labelSlice{} and pieLabeler::label{}
*** version 5.3 ***
canvasLabel class now takes 2 additionnal options: -select and
  -selectcolor
pieBoxLabeler labels when selected show a left-side embedded white
rectangle (tunable with -bulletwidth and -selectcolor options on
  canvasLabel), instead of increased border width
piePeripheralLabeler labels when selected show a white bullet (tunable
with -selectcolor option on canvasLabel), instead of increased border
  width
*** version 5.2.2 ***
ignore background slice when returning current slice in pie code
  (pie::currentSlice procedure)
*** version 5.2.1 ***
pieBoxLabeler and piePeripheralLabeler classes destructor were not
  properly deleting canvasLabelsArray sub-object
*** version 5.2 ***
pie -title option now works again
requires stooop version 3.6 instead of never released 3.5.2
*** version 5.1 ***
replaced pie -scale option by -height and -width options
pie slices are now resized as slices are deleted or added to leave
  room for the labeler labels, so that specified pie width and height
  are kept constant
added -startandextent option for slice
removed coordinates from the slice constructor parameters
added -widestvaluetext to piePeripheralLabeller class
renamed pieGraphics tag to pieSlices
*** version 5.0 ***
pies are now resizable
added -scale option to pie, slice and canvasLabel classes
  (note: -scale option is likely to be change to -width and -height in
  the future)
demo performs dynamic resizing of pie when main window size is changed
*** version 4.3 ***
renamed objectSelection class to objectSelector
objectSelector derived from new selector class
*** version 4.2 ***
added objectSelection class
used in pie class for slices extended selection facility
*** version 4.1 ***
pkgIndex.tcl and instapkg.tcl are now automatically rebuilt when releasing
removed util.tcl
improved tkpiechart package (in the Tcl sense) reliability
*** version 4.0 ***
made slice deletion possible
replaced manual pages by HTML documentation with embedded plugin demo
added pie -selectable option for slice selection
derived all classes with options from stooop switched class
fixed labeler misspelling (labeller), renamed:
  -labeler pie option, pieBoxLabeler, piePeripheralLabeller classes
augmented package installation documentation with switched package
*** version 3.0.3 ***
non-existing title would create an error in pie destructor
*** version 3.0.2 ***
fixed pkgIndex.tcl which was not compatible with stooop 3.x
corrected erroneous comments in INSTALL file
*** version 3.0.1 ***
forgot a reference to stooop 2.6 in instapkg.tcl
*** version 3.0 ***
stooop namespace version (3.0) compatible
*** version 2.3 ***
added Tcl package support
tested compatible with wish 8.0
*** version 2.2 ***
Tcl plug-in compatibility
added -xoffset options to labellers
*** version 2.1 ***
Use stooop extension
Added several title options to pie
*** version 2.0 ***
For Tcl 7.4 and Tk 4.0, also works with Tcl 7.5 and Tk 4.1 a2 (on Windows!).
Pie only composed of canvas items and displayed in a canvas, so printing is easy.
Pie has a canvas tag so it can be moved easily using normal canvas functionality.
Use of new canvasLabel and canvasLabelsArray classes for pie labelling.
Use of switched options in constructors and configuration functions.
One step further in object orientation with virtual functions.
Added optional label placers, such as value next to the corresponding slice.
Removed slice highlighting (may be reintroduced later if there is demand).
Use degrees instead or radians in slice code to simplify and improve performance.
Slices are no longer sized by passing a percent value but a unit share value (between 0 and 1).
The slice label can be updated with an optional user defined value.
Added a crunched file that can be sourced as is.
New simplified and more efficient delete and new implementations, virtual operators added.
*** version 1.2 ***
For Tcl 7.4 and Tk 4.0 b4.
New pie man page.
New slice color list pie constructor parameter.
*** version 1.1 ***
For Tcl 7.4 and Tk 4.0.
New simplified and more efficient delete and new implementations.
Simplified pie and slice code to improve performance.
New oop man page.
*** version 1.0 ***
For Tcl 7.3 and Tk 3.6.
