Add Rails dev boost gem

This gem also affects how Vagrant VM works.
Small fix on Channels::Profiles controller

Add bang (!) to find method
Remove duplicated asset file

Lolwut. Why do we have 2 jquery.ui?
The project now is agnostic about which management library you want to use

We will only enforce updated rubies, not RVM or RBENV.
Add comments to Vagrant file

Because documentation is good.
Fix failures and warning