Merge branch 'release/0.2.0' into develop
Added method to get all pull requests
Added unit test for pull requests
Merged in pierredup/bitbucket-api/master (pull request #4)

Add method to get all pull requests
updated docs/repositories/pullrequests.md to reflect changes from PR#4
bumped version to 0.2.1
Merge branch 'release/0.2.1'