Multi-repl

[jonpither]

• Limit output to REPL sessions only, at present all traffic through the nREPL connection is shared
• send out the eval requests through the pipe
• embed alias in the eval code
• Rename ops (i.e. repl-out -> multi-repl-forward-out, repl-eval -> multi-repl-forward-eval)
• Unit tests around MR functionality
• How to interupt
• Remove deprecated watch functionality
• Paredit
• Think about styling, font-locking
• Not clearing nrepl-requests in MR #21 Clear nREPL requests