Allow channels to have specific urls to propose projects
Rename new attribute of channels
Forbid users to submit projects in channels with external application
Only decorate a channel if there is a channel
On /start if there is no channel and application_url, then link to new project path
Create channel constraint to deal with channel subdomain routes
Update neighborly-dashboard
Hide invest under http auth
Add remaining_days to project header cache key

It closes #586
Get rid of InheritedResources in contributions controller
Get rid of InheritedResources in matches controller
Fix caching for contribution when user is admin
Remove cache from contribution box
Always show the payment menu on users
Add remaining_days to project box cache key
Remove failed status of projects
Remove credit system

Features related to failed status of projects (just removed)
are dependent of this.
Remove all or none campaign type
Remove more references of credits
Name new migration reflecting its final purpose