updates challenges to create an activity for the user
adds delete ability to challenge attemtps
updates date time format and challenge attempts page
testing async
changes back to embedded true
fixes broken cuke
Merge pull request #12 from CerebralStorm/async

Async
Merge pull request #13 from CerebralStorm/refactor_challenges

Refactor challenges
adds a little more style to challenge attempts
add created at to activities
updates activities for list form
various fixes
Merge pull request #14 from CerebralStorm/pagination

Pagination
splits competitions page into categories
adds next/previous page for activities.
adds async and experience metrics
blah
adds back activities to users
blah
adds color coding to competitions