Update README.md
パフォーマンス改善
Update 0.0.14
Update appraisals file
Update appraisals file
Fix deplicated rspec syntax
Fix travis.yml
Update support ruby version
Merge pull request #1 from SonicGarden/update_support_rails_version

Update support rails version
Merge branch 'master' into xray

Conflicts:
	Gemfile.lock
	gemfiles/2.3.gemfile.lock
	lib/copy_tuner_client/version.rb