Removed unnecessary usage of QUnit.newMwEnvironment in QUnit tests

This makes the DataValues extensions more independent from MediaWiki.

Change-Id: I00aa9cf53048f08700f77e07cf9867452150c995
[coordinate.js] Implemented "coordinateinput" widget

The "coordinateinput" jQuery widget extends an input element with the ability to handle
coordinate values.

Change-Id: I3cecd8e16719215d633537f57801c79082278328
Merge "[coordinate.js] Implemented "coordinateinput" widget"
Merge "Removed unnecessary usage of QUnit.newMwEnvironment in QUnit tests"