Issue #101 Implemented RtOrganization.
Issue #101 Changed URI from "/users/orgs" to "/orgs/:id"
Merge branch 'master' into 101

Conflicts:
	src/main/java/com/jcabi/github/RtOrganization.java
Issue #101 Implemented RtOrganization and RtOrganizationTest
Merge pull request #292 from carlosmiranda/101

Issue #101 Implemented RtOrganization