changed IsCurrentTrainee to bool

This is a much better convention to follow than hard-coding 'Y' or 'N', where you have to remember which one was used (was it upper or lower case).  In ORM systems, the language accessing the database can use actual true/false.  This is a lot cleaner.
changed code to match bool IsCurrentTrainee
Merge pull request #15 from shadowdoc/fix-active-resident-column

Fix IsCurrentTrainee column