0.03 2014-02-20
  - Added support for semicolon as a separator in data sets.
  - Added support pairs without value (i.e. without '=' sign).

0.02 2013-09-30
  - No functional changes in this release, only documentation improvements.
  - Rewritten most documentation
  - Added a section about performance

0.01 2011-07-12
  - Original version