Issue #184: Added an integration test for RtGist.fork()
Issue 291. MkPublicKey.Json() method implemented. MkPublicKey and MkPublicKeys adding nodes to xml bug fixed.
Issue 291. MkPublicKeyTest one-time variables mistake fixed.
Merge branch 'master' of github.com:aistomin/jcabi-github into 291_1
Issue #343  - Implemented remove a deploy key API
Merge branch 'master' into issue184

Conflicts:
	src/test/java/com/jcabi/github/RtGistITCase.java
Issue #184: Improved RtGistITCase.forksGist()
Issue #184: Fixed documentation
Merge branch 'master' of github.com:aistomin/jcabi-github into 291_1
Issue 291. MkPublicKeyTest variable names changed according to code convention.
Merge pull request #340 from aistomin/291_1

#340: pull request Issue 291. MkPublicKey.Json() method implemented.
Merge pull request #349 from asinyagin/issue184

#349: pull request Issue #184
Merge pull request #345 from lthuangiang/343

#345: pull request Issue #343 - Implemented remove a deploy key API