Added header partial

- Replaced old header
- Menu icon needs to be bought / attributed
Differentiate headers between author and expert view
Moved left sidebar into a partial
Added left-sidebar.js

Adds interactivity with the left-sidebar. Will eventually merge into
sidebar.js
Added CSS rules for updating to mock

- Keeping these separate for now
Moved description modal to sidebar, added locals
Merge pull request #37 from ofagbemi/jf-updateHeader

Update header
Positioned timeline and left sidebar on menu open / close
Added styles to the timeline
Removed well class from timeline
Set menu to active at the start
Stretch span to show both buttons
Removed extra div
Added code to set positions for the sidebar and timeline

Runs in the edit page. Is there a better place to put this?
Changed "setPositions" to "setEditPage"
Set timeline width on load and transitions
Updated modal info sign
Pushed Add Time button back to its old position
Placed tour, back, and start / end buttons
Adjusted timeline height on window resize and load