Support for multi-char-separators in CSV

This change requires that the following patch is applied to OpenCSV:

http://sourceforge.net/tracker/index.php?func=detail&aid=3599477&group_id=148905&atid=773543
Removed exclude, because extensions' .class files were not included in the app
Merge pull request #658 from Arcadelia/CSV_Multi-char-separator_support

Support for multi-char-separators in CSV
Merge pull request #784 from sparkica/mac_dist_fix

Don't exclude .class files - fixes #780