Updates for competitions

These updates allow more than one competition to have content pages.
Sendgrid email configuration

If we insert a username/password we can have email enabled by using
django.core.email...
added azure footer logo
Merge remote-tracking branch 'upstream/master'

Conflicts:
	codalab/apps/web/static/foundation/css/codalab.css
RevealDialogIssue_Reflow_09_10_2013