redirect non-authenticated users to sign-in page
Merge pull request #11 from lukemesiti/lukeDevel

Yay! This is sweet!
created invites model and invites controller. updated model relationships between users, events and invites.
fixed confilct with schema when adding invites table to the database.
Merge branch 'master' of github.com:lukemesiti/autismconnect
added comment to pages controller, modified routes file to put a slash inside the root method
merging from master
Merge branch 'master' into samDev