Merge pull request #1 from mrflip/master

Made the support files (gemspec, Gemfile, etc) look like goliath's)
Middlewares to do many useful forms of diagnosis and fault injection:
* force_delay       does a 'sleep for x +- y' seconds before responding
* force_drop        drops the connection, before or after its middleware descendents run
* force_fault       raises the requested type of error (eg _fault=404 will bail out of the rpocessing chain, returning a 404 Not Found response
* force_response    forcibly replaces the status, headers or body with what's given in the URL
* handle_exceptions gives you response methods, same that the middleware provides, for your app
* diagnostics recycles info about the request into the output
middleware to load white-listed params into the env; another to load static values into the env
reworked injection middlewares to be configured by env, not params (back to how it ics api) so that it's actually useful outside test rig
minor tweaks to utility middlewares while landing the last pieces
force timeout calls its response chain rather than raising an exception.
 it now formulates the response in the timeout condition directly, and calls its middleware predecessor with that error reposnse. This was always the intended behavior, but a too-helpful rescue block was making it skip the remaining middleware chain.
more clearer the documentation was made to be
A statsd agent and plugin, and a middleware to log all response times and durations ot statsd
middleware to handle CORS (Cross-Origin Resource Sharing) headers, a superior alternative to JSON-p
Walkthrough of the interplay among EM blocks and fibers
son_of_a_batch -- lets one request to an endpoint become dozens of concurrent requests to remote sites. Really handy when you want to scatter-gather HTTP calls from a non-concurrent system like rails