configuring protocol bindings in the command line runner

[h0ru5]

To extend or generally configure the command line runner, we forsee to look for a wot-servient.conf.json in the directory.

This should in future also be used to include protocol adapters.
if the json file includes the entries:

"servers" : [
   "node-wot-protocols-coap-server"
],
"clients" : [
    "node-wot-protocols-coap-client"
]

then the cli should attempt to require() them and add them to the servient

[mkovatsc]

Moved to eclipse-thingweb/node-wot#14.
Closing here.