Use ethon 0.4.1
Correcting 'achieved', adding reference to curl docs.
Merge pull request #204 from sshingler/master

Tiny comment/doc improvement
Use ethon v0.4.2.
Remove rvmrc.
Move dev/test dependencies to gemfile and remoce mocha dependency.
Use new rspec expect syntax.
Remove json dep.
Revert "Remove json dep."

This reverts commit 315496b4b631a0fffd8f1118f8d5c6e7b5606d3a.
Mention that Easy and Multi moved to Ethon.
Add basic stub functionality
Remove old comment.
Typo.
Add stubbing for requests.
Add global on_complete callback.
Try to reuse expectations.
Let #response return one by one.
Return status_message when in options.
Add setter for header.
Add on_success and on_failure callbacks.