Merge pull request #122 from guangyang/dev

disable integration tests in travis
fix gemspec warnings
update the version
try to fix travis
Merge pull request #123 from guangyang/release-0.6.1

Release 0.6.1
update changelog
run travis again
try to fix travis
loose mocha dependency version
Merge pull request #126 from guangyang/release-0.6.1

Release 0.6.1
Added restart role API and tests.
Bug Fix in delete deployment API.
Indentation and test case cleanup.
Added API for add disk, restart role and add/update/delete virtual machine endpoint.
Unit and integration test for add disk, restart role and update endpoints.
Update Readme.
Merge pull request #129 from MSOpenTech/dev

Ruby SDK Enhancements PR
Merge pull request #127 from WindowsAzure/master

master to dev for release 0.6.1
update changelog
update version