Add npm install binary mappings for the server and cli

Running 'npm install -g' will now install the cli and server into the
PATH. They are installed as:
  * 'prefix'/bin/svmp-server
  * 'prefix'/bin/svmp-config

where 'prefix' is something like '/usr/local/'.

The server configuration file is still stored in with the code, which
will end up being:

  'prefix'/lib/node_modules/svmp-server/config/config-local.js

Change-Id: Ie42327448dcd1d6f230bae14a54c280c6be1d47a