Fixed a regression introduced in [r780]
Fixed issue in implementation of ticket #474
Fixed issue in implementation of ticket #536
Implemented ticket #474 "Improve 'get' and 'set' syntax"
Improved implementation of ticket #480 - Triggering the second instance checker will now result in a flashing icon in the taskbar
Fixed issues in implementation of ticket #536 - Bin count for histograms was calculated erroneously - Stats could not be calculated on tables with empty columns
Implemented ticket #538 "Remove unecessary files"
Implemented ticket #536 "Refactor code for old commands"
Implemented part of ticket #536 Initial rework of plugin_histogram.cpp
Implemented part of ticket #536 Resolved a bug in plugin_statistics.cpp and added documentation comments.