Prevent errors when calling getParent
Merge branch 'issue-80' into dev
Fix typo
Build
Test against latest stable version of dropzone
Build and bump version
Empty folder on refreshing folder state
Fix travis build
Use bower for test dependencies
Prevent dragging a folder into descendant folders

[fixes #82]
Build
Don't call cancelDrag() if folder is dragged into descendant

... because that stops dragging into ANY other folder