update AUTHORS
Issue #542

https://github.com/sinatra/sinatra/issues/542. request["SOME_HEADER"]
is a little confusing since the [] operator on request object is a 
shortcut to the params hash. And thus, request["key"] is same as 
params["key"]. Updated the same thing.
Update Russian README
Typo in README
typo

Conflicts:
	README.rdoc
reduce build matrix, depend on newer rack
fix test name generation for tilt master
adjust response tests for edge rack
add notes about rackup, fixes #313
Fix typo "whitout" to "without".
README: use long polling to exemplify streaming API.

[Long polling][1] is a simple, practical use case of `stream` helper with the
optional `keep_open` parameter.  Let's use it to exemplify streaming API, so it
is easier to understand and use.

[1]: http://en.wikipedia.org/wiki/Push_technology#Long_polling

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Fix a typo in Stream class's documentation.

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Update Sinatra::Response#finish for Rack 1.5