fix docs preview
wrap some javascript methods on a Utils class to make tests easier
renamed some javascript client configurations
added support for OPTIONS method on publisher location
change default header template for EventSource connections
avoid reapply formatter to header, message or footer template when inside an if on event source mode
add thin gem to help on javascript tests
add behavior tests to javascript client
fix some publisher tests
using a single function to read request body and execute the handler
move some code to utils to be reused
rename module context struct
make possible get statistics for some channels at once specifying their ids
make possible post messages in some channels or delete them at once specifying their ids on push_stream_channels_path diretive separated by a slash