setting repository name is now done at extension startup
PLGCT-19 adding DTO and service connector for pull request
Typo: no period at the end if not in multiple lines
PLGCT-1 Refactoring step check if user has a fork from origin repo already existing & fork if not

Task-Url: https://jira.codenvycorp.com/browse/PLGCT-1
Fix header
correcting fork already exist notification message
adding back quote in message
PLGCT-21 Checks if working branch exists before creation