added users and invitations models
updated admin side of intranet - about to move files outside of gem
updates to intranet
Merge branch 'tukaiz' of https://github.com/LaunchPadLab/engine into tukaiz-intranet
added resources to site
removed obsolete link from settings tab
fixed preview error related to toolbar insert after body tag
ready to push preview fix
Merge pull request #18 from LaunchPadLab/preview-fix

Preview fix
site admins can manage account and fixed layout of page access
added ability to sign up and sign in to intranet via templates
modified code that determines if a page is public
Merge pull request #20 from LaunchPadLab/tukaiz-intranet

Tukaiz intranet
Merge pull request #19 from LaunchPadLab/permissions

site admins can manage account and fixed layout of page access
updated content_entries api controller for function and group
fixed logic of intranet security - need to write tests
refactored custom api logic into separate class
fixed bugs related to filtering
An event has a function (required) and a group (optional)
modified events