Add ellipsoid geometry functions
Add target to download and install Proj4js
Add Proj4js to test framework
Add Proj4js integration tests
Merge pull request #198 from twpayne/ellipsoid

Add ellipsoid geometry functions
Merge pull request #200 from twpayne/proj4js-tests

Proj4js tests
Rename MapBrowserEventHandler internal handlers name
Remove touch events handling in handleMouse* handlers
Add listeners for touchstart, touchmove and touchend events
Listen to IE pointer events
Move dblclick handling into touch handlers
Remove unused goog.require
Add ol.interaction.TouchPan
Add ol.interaction.TouchRotateAndZoom
Listen to both mouse and touch events