Re-add phaser

ISSUE: github app keeps crashing when phaser.js is added directly from
cloned phaser repo

Hypothesis: Git files (such as logged issues) from cloned repo are
clashing with my files, so getting a "pure" version should solve the
problem

This commit is my attempt at that!

NOTE: In History - if the "PHASER 2.0.7" is clicked on, the app will
crash… (-_-)