Harder, better, faster, stronger

Harder, better, faster, stronger
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What is included in this pull request?

* make.js file for **easy building** via nodejs
* Over **2x speed** increase for grid rendering!
   * 50 items with old script took took **619ms** to render on my machine
   * 50 items with new script takes **255ms** to render on my machine
* **Selector caching** system. Other people can use this to speed up the grid even more!