Merge pull request #3 from daviferreira/master

1.2.0
Merge https://github.com/daviferreira/medium-editor
Fix: prevent to open toolbar when change select node
Merge pull request #78 from pedronasser/fix/changeNode

Fix: prevent a way to open toolbar on a disabled toolbar editor
Adds contributors to the README
Generates new dist files
When already visible cool moving toolbar to another new selection
Merged master fixed conflict.
Remove style and class actions in checkSelection()

All actions on toolbar element are in showToolbarActions() and
hideToolbarAction()
Update Jasmine tests
Improve demo