update changes
no longer override define_singleton_method, fixes #567
fix changes
less 1.x is no longer supported by tilt
Use `headers` instead of `header`, since in `Rack::Response` `headers` is an alias for `header` and `headers` is widely used in Sinatra. It's confusing that in `Sinatra::Response#finish` both `headers` and `header`.
Fix test failures with RDoc 4 broken by commit rdoc/rdoc@7f0033d
use rdoc 3.x on 1.8
move the form tag before script tag

currently this demo is not working, this is because when $("form") bind "submit" event, the form tag is not in DOM yet. Need to move form before the binding.
Conflicts:
	examples/chat.rb
Silence Rack::Session::Cookie warnings
fix rake thanks
avoid test name collision
avoid to_enum warning on 2.0
make bundler happy
bump version