curses maiden ws compat

[ngwese]

fixes #978

this is a minimal change that allows the original curses based maiden to work along side the web based version. through the magic of nanomsg both the console repl and the web repl work at the same time. input is not echoed to each repl but each repl does see the same output.

note: to compile i needed to sudo apt-get install libncursesw5-dev

an outstanding issue which this PR doesn't address is the duplicate command names. perhaps it is worth reimplementing this in go and rolling it into the maiden backend command as maiden repl. one advantage of integrating it in the go based command would be the ability to run it on a different host (along side a non-web based editor).

[tehn]

omg you make it look so simple.

[tehn]

super super rad! thanks for taking the time.

[ngwese]

...in the end after i understood the basic structure of the code it ended up being simple. the main difference was that the ws sockets are bi-directional. it was probably 45 min work in the end.