added a navbar

commented out previous navbar
setup js/css for studentFeedbackResults, & apply BS to page name and top panel
finish Bootstrap app for studentFeedbackResults
adjust table column width for feedbackResponseComments
Convert to using bootstrap
Adjust the css file
make it responsive
Change background gradient color
added necessary files
Finalize CSS file
handled minor bug related to logout
Added studentEvalResults page to the prototypes.html
Merge branch 'bootstrap' of https://github.com/TEAMMATES/repo into Issue2010
Merge branch 'Issue2009' into bootstrap
Merge branch 'Issue2010' into bootstrap
Change according to update in header
add sanitization
change element type
Merge pull request #2017 from TEAMMATES/Issue2012

Apply Bootstrap to studentFeedbackResults #2012
Merge remote-tracking branch 'origin/bootstrap' into Issue2019