Fix failure path for invalid backer values
Controller spec for invalid backer values

post is called twice. The second time is after the :errors stub is
in place. Ideally this would be called once.
Missing l10n for new backer error

Taken from 7c9d064

An more specific error message could be set in the controller, for
example:
flash[:failure] = @backer.errors.full_messages.first
Changes the permalink verification process on the project model

Added permalink validation to the model, checking if the permalink isn't used by catarse's routes.
Merge pull request #171 from barboza/model_permalink_check

Changes the permalink verification process on the project model
fix case when current_user is nil
Refactors the permalink validation 

Modified some methods to look prettier and moves the error message to the locale files
Merge pull request #172 from barboza/model_permalink_check

Refactors the permalink validation
Merge pull request #170 from ianfleeton/invalid-backer-values

Invalid backer values
added timezone to expires_at function
take deleted state into consideration when we gather statistcs of backers
Merge branch 'master' of github.com:catarse/catarse
fix ambiguous column name
fix more ambiguous column names
solving conflicts