Merge pull request #9 from FreekDB/master

Small change in I2B2ODMStudyHandler: tntroduced studyName variable in processODMStudy method
Small correction about the writer names.
Added the first lines of columns file and wordmap file.
- Removed unused clinicalData parameter from saveItemData method.
- Commented out code related to messageDigest and conceptBuffer (currently disabled).
- Fixed some typos and added some Javadocs.