ReportLab 1.15 released

[Robin Becker]

ReportLab 1.15 has been released

Main changes since ReportLab 1.14:

- Backgrounds for various charts. Dirk Datzert inspired these changes.
- TTF font improvements. Contributed by Marius Gedminas.
- Added multi-color single data barchart.
- renderPM now supports imageshape.
- renderPM synched with libart 2.3.10
- simple support for Acrobat forms in ReportLab documents.
- various improvements and bugfixes.
-- 
Robin Becker