Modified edit_study.html to include initial version of dynamic tabs.
Work in progress.
Added style for tab header.
Modified edit_study.html to include functions and still use base.html
Added in index.html main page material.
Right-justified login in navigation bar.
Added in sidebar for 'news' and 'recently added studies'.
Added ability to include page-specific functions in base.html
(Necessary for edit_study.html)
Merge pull request #5 from margulies/layout_category_form

Layout category form