Merge pull request #646 from wymeditor/imageSource

One IMG_SRC for images in tests
Merge branch 'master' into classToggling
toggleClass: add some docstring
Class toggling; add test "no change when no selection"
Merge pull request #645 from wymeditor/classToggling

Tests and fix for class toggling
Merge branch 'master' into selectImagesWithRangy

Conflicts:
	src/wymeditor/editor/base.js