Equalizer.js updates and testing updates:
* Use css('height', ...) instead of height(...) -- better equalizer support for padding, border, and margins
* Use `get()` for heights `max.apply` calculation, as `$.map` returns object, not array (better equalizer browser support).
* Update Contribution docs with JavaScript testing instruction
* Update `jquery` testing matchers to new `bower` location
Merge pull request #4432 from rocketmobile/equalizer-height-fix

Equalizer: Use css('height', <val>) instead of height(<val>)