Created new mitlibraries icon set

Still loading fontawesome and fontawesome-mitlibraries...
Flexbox CSS fixes
Prevent main site ubermenu from overriding MOH ubermenu

See: https://github.com/zgreen/MITlibraries-parent/issues/4
Rewrote accordion script
Flexbox CSS fixes
Fixing $posts var overwrite

See: https://github.com/zgreen/MITlibraries-parent/issues/7
Added reserve study space link
Site-wide alerts
Resetting hours alert
Adding standard alerts below main alert

On /hours page only.