Optimized Vapour which included the following:

* Removed respond.js and selectorviz,js since they are targetting only IE8 and below and they will be address in the conditional comments already provided by WET-BOEW
* Created a yepnope prefix for polyfill loading and future dependency loading to streamline correct path finding function for the location of WET
* Introduced the global timer that will be used by plugins in the new v4.0
Merge pull request #2714 from masterbee/v4.0-vapour

Vapour: Removed IE8 coding, added polyfills, and added global timer