* avoid a filter to parse IssueTracker params
* Add acceptance test with phantomjs to be sure the Apps editing works
fine with IssueTracker
* Add IssueTrackers::None the IssueTracker configure doing nothing
class IssueTrackers::None < IssueTracker
Fields = []
Note = 'When no issue tracker has been configured, you will be able to leave comments on errors.'
Label = 'none'
end
