Styling and Script Updates

* CSS: Styled currency/region selection
* JS: Updated summary button function. Button arrow toggles on click (up/down).
* Added new arrow image.
* CSS: striped summary table and active-row highlighting
Summary-Button: Prevent animation to be queued
Summary Button: Fixed scrolling animation on click.
Sync Update
Added price definition for percent pricings
Commit
Merge branch 'css' of https://github.com/Haco/ecompc into dev