server.js: listen for shell messages
server.js: listen for shell messages

* Don't start until first message is received
* Not placed under the regular RPC mechanism

mwillbanks/octalbonescript,beagleboard/bonescript,weboide/antl,risebox/bonescript,weboide/antl,jadonk/bonescript,il9ue/bonesimulator,il9ue/bonesimulator,beagleboard/bonescript,risebox/bonescript,jadonk/bonescript,theoctal/octalbonescript