V.1.2.0 ()
 * change license from GPL to Beerware
 * changes in the architecture
 + added library

V.1.1.1 (2013-09-03)
 * optimization

V.1.1.0 (2013-09-02)
 + added help window
 + added help docs
 - small bug fixes

V.1.0.3 (2013-08-30)
 * bug fixes

V.1.0.1 (2013-07-27)
 + initial release