removed kludgy display-fix for mismatched MS office file/mime-types.
fixed minor typo
initial check-in of extended upload class. refs #3218
added mimetype correction to upload process. refs #3218
added doc block.
added CSS selectors for styling the various added MS Office type learning materials. refs #3218
fixed typos and grammatical errors in code comments.
fixed broken markup in session details display on offering mngmt. page. refs #3222
Merge pull request #81 from ucsflibtopfstedt/bug3218

supplies mime-type correction for learning material upload
Merge pull request #82 from ucsflibtopfstedt/bug3222

fixed broken markup in session details display on offering mngmt. page. ...
Merge pull request #83 from ilios/rb2.2

reintegrate branch rb2.2