Added the filter function that allows filtering a matrix with any kernel as described in ticket #657.
Updated version for tickets #699 and #729 Enabled CTRL-C, CTRL-V and CTRL-X for the terminal
Updated version for tickets #699 and #729 Improved the handling of large tables and long strings
Updated version for tickets #699 and #729 Renamed ".categories()" with ".categorylist()" and introduced ".categorize()"
Updated version for tickets #699 and #729 Improved calculation speed of two matrix functions Fixed a tiny problem in replaceall()
Implemented ticket #735 Add new trigonometric functions
Updated version for tickets #699 and #729 Improved categorical column, added corresponding method and minor improvements
Updated version for tickets #699 and #729 Improved categorical column and tested loading/saving
Created branch and initial version for tickets #699 and #729
Implemented ticket #728 "More possibilities for NaN in data"