Fix compile error
Call sent and setup response before send for synchronous calls
Added rake dev dependency for specs
Remove OPAL_VERSION, add commented on RUBY_ENGINE_VERSION
Merge pull request #1 from ryanstout/master

Add rake dependency for testing, Fix synchronous ajax calls
http/response: add #json method
http/response: name the status struct
http/request: add back X-Opal-Version header
http: improve helpers
lib: remove forwardable and struct as they've been merged into opal
http/response: wrap #xml result in DOM
*: forgot to remove requires to struct
dom/node: fix DOM call
location: fix up methods
dom/node: catch xpath exceptions
dom/node: use Array to convert xpath snapshot
dom/node: rename event API
dom/node_set: rename event API
dom/node: rename some variables
dom/node: check if a parent exist before wrapping it