Fix global leak in WebGL image layer test
Merge pull request #421 from tschaub/global-leak

Fix global leak in WebGL image layer test
Stop ignoring global leaks

The `goog.dom.ViewportSizeMonitor` (used in map.js) creates a global leak by setting `goog.UID_PROPERTY_` on the monitored window.  In order to test that we don't have other global leaks, we preemptively set the property so Mocha can compare the global before and after our tests.
Merge branch 'master' of github.com:openlayers/ol3 into use-node
Merge pull request #422 from tschaub/stop-ignoring-global-leaks

Stop ignoring global leaks
Update to Karma 0.8
Merge branch 'master' of github.com:openlayers/ol3 into use-node