2.2.1 (2010-07-19)
==================
- support $ZOPYX_CONVERT_SHELL 

2.2.0 (2010-05-15)
==================
- dedicated ConversionError exception added

2.1.1 (2010-02-19)
==================
- relaxed tidy check for existence of images

2.1.0 (2009-09-05)
==================
- Calibre integration
- API change: convert() now returns a richer dict with all related
  conversion results

2.0.4 (2009-07-07)
====================
- pinned BeautifulSoup 3.0.x

2.0.3 (2009-07-05)
====================
- fix in fop.py

2.0.2 (2009-06-02)
====================
- fixed broken path for test data files

2.0.1 (2009-06-02)
====================
- added environment variable ZOPYX_CONVERT_EXECUTE_METHOD to control the usage
  of the process module vs. os.system() (in case of hanging Java processes).
  Possible values: 'process' (default), 'system'

2.0.0 (2009-05-14)
====================
- final release

2.0.0b3 (25.12.2008)
====================
- tidy: rewrite image references relative to the html
  file to be converted

2.0.0b2 (05.10.2008)
====================
- fixed some import errors
- now working with zopyx.smartprintng.core

2.0.0b1 (04.10.2008)
====================
- initial release
- complete new reimplementation of zopyx.convert
- added support for PrinceXML
