enable content tab and pedagogy tab

commented out broken pedagogy render tags
made all main pages render off of the index action
all quotes are now single quotes
style fixes :lipstick:
Merge pull request #98 from IMOD-ASU/enable-content-page

Enable Content tab and Pedagogy tab
fixing return navigation on recently enabled pages
Merge pull request #99 from IMOD-ASU/fixing-return-navigation

Fixing return navigation on recently enabled pages
Fixing style for element overflowing their containers on the page

Removing more ie6 shims
Merge pull request #100 from IMOD-ASU/fixing-overflow-styling

Fixing overflow styling
code style :lipstick:
adding regex to find base url
Merge pull request #101 from IMOD-ASU/fixing-performance-for-test-enviornment

Fixing Performance tab for test enviornment
:lipstick:

deleting duplicated style,
fixing style,
removing IE shims,
simplifying css queries
:lipstick:

combining css attributes
:lipstick:

attributes ordered according to box model
reworking tabs to be centered

had to disable jquery ui tabs for sub tab, because it does not support centering
Merge pull request #102 from IMOD-ASU/learning-objective-subheader-center

Learning Objective - Subheader - Center
Merge branch 'development' of https://github.com/IMOD-ASU/imod into markdown-documentation