Fixed #186
2.1.5
fixed travis configuration.

nvm node version os not a float, it's a string
switched travis badge to SVG version
Fixing issue 159
Merge pull request #189 from jrencz/travis-fix

fixed travis configuration.
Merge pull request #190 from jrencz/readme-travis-fix

switched travis badge to SVG version
Merge pull request #192 from markwylde/master

Fixing issue 159
Forgot to add fix to destroy
Merge pull request #193 from markwylde/master

Forgot to add fix to destroy
Merge #192 #193
Merge remote-tracking branch 'upstream/master'

Conflicts:
	demo/dist/angular-ui-tree.min.js
	dist/angular-ui-tree.min.js