Added PullRequestService to the bundle.
Fixed unit tests for CommitService.
Added unit tests for BranchService, FilesService and PullRequestService.
Merge branch 'master' of https://github.com/MedicoreNL/StashApiBundle into feature/pullrequest-service

Conflicts:
	Service/AbstractService.php
	Service/CommitsService.php
	Service/FilesService.php
	Tests/Service/BranchesServiceTest.php
	Tests/Service/CommitsServiceTest.php
	Tests/Service/FilesServiceTest.php
Syntax error.
Fixed bugs in CommitService class.
Merge pull request #3 from pkeulers/feature/pullrequest-service

Added PullRequestService to the bundle.