PRD-4373 - CSVTEXT function now always enforces the quote, regardless of whether the text needs quoting. This matches user expections better.
PRD-3903 - DATEDIF calculations were wrong as we were not using the calenard correctly. The implementation is now compatible with Excel 2010.
[CLEANUP] - IntelliJ config update
Merge pull request #516 from tmorgner/PRD-4373

PRD-4373 - CSVTEXT function now always enforces the quote, regardless of...
Merge pull request #515 from tmorgner/PRD-3903

PRD-3903 - Fixing the date diff function