To allow non sysops to save via VE, refactored ve save api
to use doEdit which bypasses namespace protection.
Add edit link in view nav for non sysop so that they may edit
Add View source link in dropdown for non sysops
Add Edit source link in dropdown for sysops
Cleaned up some of the integration core code
UI tweaks
Change-Id: Ib4249bc5fb7ffa6410e4f2d278aafbb871800981
Save action
1) posts html to parsoid service in exchange for wikitext
2) saves wikitext
3) returns parsed content.
On save, VE is hidden and page content is replaced.
Demoing save in toolbar, followup commit will redesign save options
Change-Id: Ibfbe52de08e3483e1a33f0740c03f96ec2b7f90a
