add therubyracer gem to Gemfile.
seems like therubyracer does not work on jruby and rubinius
Merge pull request #666 from patriciomacadden/gemfile-therubyracer

Add therubyracer gem to Gemfile
add redcarpet gem to Gemfile
add bluecloth to Gemfile
Merge pull request #668 from patriciomacadden/gemfile-bluecloth

Add bluecloth to Gemfile
README some small fixes
update German Readme
Merge pull request #669 from burningTyger/master

update German Readme and some small English Readme fixes
Merge branch 'master' of github.com:sinatra/sinatra

Conflicts:
	Gemfile
server can have different defaults now
update Requirement section
fix markup
fix section hierarchy in readme
update list of http methods
make AcceptEntry behave like string
fix test for Ruby 2.0
avoid test name collision
avoid to_enum warning on 2.0
Merge branch 'master' into prerelease