Added standard error codes for parsing functions.
Merge remote-tracking branch 'upstream/develop' into develop
Added standard error code for parsing functions to error codes class.
Merge pull request #159 from wolfgangmm/develop

Allow query caught in endless recursion to be killed
Merge pull request #160 from claudius108/develop

Added error messages for parsing functions.
Improved rendering of error messages for parsing functions.
Improved again the rendering of error messages.
Merge pull request #161 from claudius108/develop

Improved rendering of error messages for parsing functions.
Merge pull request #165 from wolfgangmm/develop

[performance] Optimizer did not descend into general comparison
Remove JFreeChart extension, available now in separate repository: https://github.com/eXist-db/jfreechart
Merge pull request #167 from dizzzz/develop

Remove JFreeChart extension