Fixed missing parts of ticket #252 "spline" and "taylor" are now recognized as commands, which are changing definitions
Only property change to remove CodeBlocks' autosave files
Implemented ticket #252 "Add a splines calculation functionality"
This new functionality required the new "ivl()" interval function, which is also implemented with this commit.
Fixed issue #251 "Error messages are not completely red"
Fixed issue #250 "Interference with global, local and passed variables in procedures"
Fixed issue #249 "Autoindentation not working correctly"
Fixed some remaining issues
Fixed issue #248 "Custom defined functions are not displayed correctly"
Performed also some small code fixes in various modules
Fixed issue #247 "Check message queue between kernel and GUI"
Also fixed rare issue in the handling of vector variables
Implemented ticket #244 "Move duplicate code analysis to secondary thread"
(Also added some little fixes to the plotting component)