Index file to point to the library.

This index file helps to give a more natural invocation
to the library when it is included in applications.

By this file being here, in applications we can do

      var nodem = require('ewdgateway2');

instead of the less natural, and less portable expression

      var nodem = require('./lib/ewdGateway2');
Merge branch 'AddIndexFile'
Fix: the entry point is ewdGlobals.

Instead of ewdGateway2.
Merge branch 'AddIndexFile'
index points now to ewdGateway2
Removed hardcoded paths to socket.io.

Let node.js do its job and find socket.io in the system.
Merge https://github.com/luisibanez/ewdGateway2