#20 Added remove() method to Gists

Added remove(String name) method to Gists to delete a gist by name, plus
unit and integration testing.
#20 fixed code style

fixed code style.
#20 fixes
from master
Issue #21: Gist forking
Merge remote-tracking branch 'upstream/master'
fixed merge conflicts
#20 fixes
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' into 20
Merge remote-tracking branch 'upstream/master'
contents method added to Repo
Contents interface and Rt class added to API
Content interface added. RtContent and RtContentTest annotated with todo
puzzles
Content interface added. RtContent and RtContentTest annotated with todo
puzzles
Puzzle updated to reflect mock implementation needs.
formated MkRepo class.
Mocks for Contents and Content added.
Todo tests and integrations tests added to RtContents class
Code style issues fix.