README and CHANGES tweaks for 0.9.0 release (#63)
* Add support for regex routes to README
* Use $LOAD_PATH instead of $:
* EventContext is no longer present
* Misc cleanup from rtomayko
Add filtering support for Accept HTTP header.
Adds an "provides"-option to a route definition, which can either be
a string specifying a MIME type, a symbol that Rack can resolve to
a MIME type, or an array of either.