Issue #326 Implemented fetching of readme file from default branch.
Issue #360 Added tests for MkPull json and patch operations.
Merge pull request #48 from jcabi/master

merge from master to my repo
Issue #445 - Mock for pull comment
Issue #360 Addressed review comments.
Merge pull request #484 from lthuangiang/445

#484: pull request Issue #445 - Mock for pull comment
Merge pull request #481 from carlosmiranda/360

Issue #360 Added tests for MkPull json and patch operations
Merge pull request #463 from carlosmiranda/326

#463: pull request Issue #326 Implemented fetching of readme file from default branch.