Merge pull request #7 from ardadouk/master

fetching changes
First implementation of REST authorization. Updated rack and rack-rpc gems, used Rack::Session::Cookie for keeping track the different authorizers per request.
Changed from Rack::Session::Cookie to Rack::Sessior:Pool for speed and finished the implementation of the REST authorizer.
Merge branch 'master' of github.com:dostavro/omf_sfa
merge taking the rest authorizer
Adding a call on rest that returns all accounts for a specific user (/resources/accounts?user=username).