MBS Filemaker Plugin, version 3.4pr6

New in this prerelease of the 3.4 plugins:

Streamlined error handling. You can now call IsError function to know if last function returned an error.
Improved Syntax Highlighting. Invalid MBS Function names are now highlighted with red color like wrong brakets.
Added new UnZipFile functions to read zip file.
Added new ZipFile functions to write zip file.
Added more Calendar functions.