added some integration tests around creating commit status
:lipstick: using statements
added test for status order
added Context property to support different system
added opt-in header for passing Context to API
added test for specifying different contexts
added test to ensure backwards compatible
Merge pull request #491 from octokit/shiftkey/testing-commit-status

added some integration tests around creating commit status
added document explaining strong naming situation
fixed the typo
Merge pull request #503 from octokit/shiftkey-patch-1

added document explaining strong naming situation
Fixed edit release api #506
Fixing xml docs
Merge pull request #507 from distantcam/editrelease

Fixed edit release api #506
Add Repository Deploy Keys client
Implement repo deploy keys client

Update comments
Add ApiUrls methods
Added unit tests
Code cleanup
Observable repo deploy keys client
Unit tests for observable repo deploy keys client