add closed? method on Stream object to inspect the object's open/close state

Signed-off-by: Anurag Priyam <anurag08priyam@gmail.com>
Update Russian README
Typo in README
Merge pull request #571 from Wolg/docs-fixes

Russian README update and typo
Fix typo "controll_tower" to "control_tower"

The typo was preventing automatic selection of ControlTower
when it was available.
Merge pull request #572 from ferrous26/patch-1

Fix typo "controll_tower" to "control_tower"
update sinatra ci server url
Merge pull request #573 from zzak/master

update sinatra ci server url
do not use hash-bang in travis ci urls
Templates: render should fall back to engine layout #563
Merge pull request #574 from zzak/fallback_to_engine_layout

Templates: render should fall back to engine layout sinatra/sinatra#563
allow engine specific layout to be true, too
Add a note for tests with modular setup
fix indentation
also delegate register
typo
Fix 2 broken links in all READMEs.
Adding link to wikipedia DSL article.

Signed-off-by: Dan Buch <d.buch@modcloth.com>
reduce build matrix, depend on newer rack
don't run wlang on rbx in 1.9 mode