Merge pull request #82 from ericcj/master

lots of fixes, read the commit messages
fix issue #83 save boolean fields set to false
added test for issue #83, boolean value false to json resulted it nil
added new test with save and query over HTTP
Merge pull request #84 from vircheck/master

fix issue #83
added list of contributors to readme
Merge pull request #85 from ericcj/master

don't retry on 4xx errors even if they have invalid json
Use simplecov instead of rcov
Change http to https in Gemfile
Merge pull request #87 from chytreg/feature/simplecov

Change rcov to simplecov
Merge remote-tracking branch 'adelevie/master'

Conflicts:
	.travis.yml
	Gemfile
	Gemfile.lock
	Rakefile