v0.2.1:
* Make it possible to use 'import pyocr' instead of 'from pyocr import pyocr'.
  'from pyocr import pyocr' still works.
* Fix dependency list: depends on Pillow (it's untested with PIL)
* Fix pyocr.VERSION

Signed-off-by: Jerome Flesch <jflesch@wyplay.com>