Mention Rails 3 support
Dry-up the engine configuration
Clean unused copy of new_uninitialized_app in irb tests
Replace :PROMPT with proper :PROMPT_MODE in irb tests
Normalize the whitespace

It's a purely stylistic change, but its something that bugged me for a
while.

[skip ci]
Implement and test WebConsole::REPL::IRB#send_interrupt
Suppress ^C to the STDOUT on interruptions
Raise ::IRB::Abort only in the fiber's thread
Make the interrupt test more strict
No need for the custom fibers anymore
No need for the stream capturing too
Drop the adapters concept
Turn WebConsole::REPL into a process master
Adjust the model to the new REPLs

Not the best idea, but let it be for now.
First prototype draft

It's broken but it is a showoff... blah.
Second draft

A bit better, but still sucky.
Third draft, it looks (kinda) like it did before
Use long polling

The blocking wait on output is pefrect for that.
Run bin/rails instead of plain rails
Add WebConsole::REPL#alive? and fix typos