UI enhancements in the home and about page
removed hero.ejs file and integrated the header content in the index.ejs file
dialog box ui for create event
if the user is not logged in the create an unhangout invokes a different dialog now
added a server side configuration parameter named managers in conf.json file
added upcoming event for the homepage and all the ai files for logo and favicon
Event admins send messages to sessions (no tests yet)
Add tests for event->session messages
Fix error hiding modal
Decrease timeout for re-posting messages to 5000.
integrated node-mailer with event description submission
Fixed a small typo in title
Merge branch 'master' into header-ui

Conflicts:
	lib/unhangout-routes.js
	views/_hero.ejs
	views/about.ejs
	views/header.ejs
	views/index.ejs
changed the color scheme of permalink page and added a favicon
Style and cleanup fixes post-merge

 - Replace -webkit- specific style with cross-browser
 - Move .brand styles to stylesheet (scoped as `.navbar-inverse .brand`
   to successfully override bootstrap default)
 - Rewrite .participant-info markup and styles, hopefully will fix
   issue #163
 - Kept with 4-spaces for js, 2-spaces for HTML/styl, expressing my
   inner pedant.
 - fixed font-awesome CDN link
 - moved modals to footer, for better screen-reader friendliness
 - moved modal-footer out of modal-body.
Merge branch 'message-sessions' into header-ui
Add back older font-awesome
Merge remote-tracking branch 'origin/header-ui' into header-ui

Conflicts:
	views/permalink-header.ejs
	views/permalink-intro.ejs
removed permalink header file
added profile thumbnail and Login button ui tweaks in _navbar which were left in header.ejs file