Add detection for IE11, which uses a new user-agent system

Enyo-DCO-1.1-Signed-Off-By: Ben Combee (ben.combee@lge.com)
Merge pull request #368 from enyojs/detect-IE11

Add detection for IE11, which uses a new user-agent system

Signed-Off-By: Cole Davis (cole.davis@lge.com)