-added sixenseGetAllNewestDataAsync to sixense.cc
-updated node-sixense.js
 1. now an events.EventEmitter
 2. sixense methods are now accessible through the sixenseSDK property
 3. listener added for 'newListener' event that will call the corresponding sixenseSDK "async" method on a setInterval, if available
 4. listener added for 'removeListener' event that will clearInterval on the corresponding setInterval added by the 'newListener' event
-updated .gitignore
-updated .npmignore