added code to inform invitee about the event through email.
added email backed settings.. in local.py
email bug fix
add pencilmeinc gmail to mail settings
modified email settings
Merge branch 'vinny' of github.com:zhiweihu/pencilme-dev into vinny

Conflicts:
	pencilme/pencilme/settings/local.py
Merge branch 'master' of github.com:zhiweihu/pencilme-dev
Merge branch 'vinny'