Merge pull request #14 from jamesyothers/master

multiple design updates
Merge pull request #15 from jamesyothers/master

will not freeze when location services denied on login
Added geolocation needed text to sign in page.
Implemented functionality to limit offer submissions to once every 30 minutes.

Deleted extra spacing in other parts of code.
Merge pull request #16 from kevin1liang/master

Implemented functionality to limit offer submissions to once every 30 minutes
worked on accessing added messages
fixed dupes bug