Updated the installbase reposiitory folder
Added the SourceForge issue url to the bugtraq property of the project folders
Implemented ticket #213 "Add new matrix functions"
Implemented ticket #217 "Add context menu entries for editor tabs"
Implemented ticket #210 "Add procedures to the autocompletion"
Changed font of procedure icon
Provided icon for procedure autocompletion
Implemented ticket #199 "Implement NaNs in zeroes and extrema"
Implemented ticket #198 "Improve error messages" - Added some information to a few error messages - Further changes will be done on-the-fly
Implemented part of ticket #198 "Improve error messages" -> Changed the internal error management