Implemented ticket #740 "Do not install already installed packages"
Implemented ticket #754 "Replace *.backup files with real *.revisions"
Implemented ticket #756 "New table method 'TAB().pearson()'"
Deletet already merged branch for ticket #702
Implemented ticket #702 "Table cell shader"
Fixed an issue in build script fpr #702
Improved implementation of ticket #702 Updated wxWidgets build script to detect the needed paths itself
Improved implementation of ticket #702 - Fixed statistics issue with selecting individual cells - Simplified the handling of selected cells
Improved implementation of ticket #702 - Added more conditions - Changed default colors - Made the current col/row indicator kind of translucent - Resolved an unexpected behviour in wxGrid
Added new selectors to implementation of ticket #702