version 1.99: added a pie chart as experimental feature
version 1.3: changed default ordering and changed button order in UI.
version 1.2.1: made compatible with QGIS 2.14
version 1.2: updated to work with both QGIS 2.x and 3.x
version 1.1: updated UI, added sorting
version 1.0: no longer experimental, replaced icon, updated UI
version 0.5.1: unnecessary files were removed
version 0.5: added colors
version 0.4: updated metadata
version 0.3: cleaned up UI
version 0.2: moved main script because of bug
version 0.1: First working version
