First version working with Rails 4 and Ruby 2

 * ReimbursementAttachment#file validation temporary disabled due to
   problems writing the right fixture. Needs to be fixed before merging to
   master.
HasState as concern
Remove module TravelSupportProgram::ForceSSL
Application renamed to TravelSupport (just for sanity)
Attachment file validation is back
Filter by event in requests and reimbursements lists
Fixing a migration to be Rails 4 compatible
schema.rb changed to Rails 4 (Ruby > 1.8) format
Show always the same id for requests and their reimbursements