Channel owner can download a CSV with the subscribers data [Fix #56088536]
locked postgres-copy version to use last version compatible with Rails 3.2
Merge branch 'channel_statistics' of https://github.com/devton/catarse into channel_statistics
changed subscribers report to use postgres-copy instead of CSV.
added user url to csv
added spec for channel report
merged master
fix layout pattern at project box title
update header texts
just cleaning up unnecessary FactoryGirl constant
when user use credits to make a backer we don't need to show the payment options [Fix #56702308]
moved channel_spec and removed unnecessary FactoryGirl const
added subscriber_reports association
created a database view exclusive for the channel subscribers report
renamed SubscribersController to SubscribersReports controller and removed unnecessary code to report generation, now this model uses a specific database view (hence the renaming).
begin_of_association_chain should be private
tidying up a bit the view
removed unnecessary spaces
Merge pull request #307 from devton/payments_options_dont_need_to_show_with_credits

when user use credits to make a backer we don't need to show the payment...
fixed failing spec