acu182886 update rest-client version
Merge pull request #142 from rightscale/travis

Add support for travis-ci and coveralls
Merge branch 'cm_14_20_acu182886_trac19374_rest_client_gem_freeze_version_1_6_7'

Conflicts:
	Gemfile.lock
Dependency cleanup: move things into proper groups; conditionally add Rake tasks depending on gem presence; make optional gems no-require.
Fix a Hash literal that does not parse under Ruby 1.8
Fix a subtle bug that causes our string-scrubbing logic not to work right under Ruby 1.9 and 2.0.