fix pull, no test since this is soon to be generalized.
adding Command::ArgsProcessor to find indexes in the command line args chain.
pass command name in Dynamic constructor. use ArgsProcessor in Command.
cleanup commit test.
add a commit -m test (still failing).
override Command#process, only and let Command#call handle the args splitting. fixes stuff like `nit commit -m "awesome!" abc`.
move all commands into commands/ and resp. namespace.
releasing 0.0.3.