documentation updates: removed backdrop for all the steps, manually updated version in page main header
Fixes #171. Rename reserved word 'goto' to 'goTo'
Adjust task for less compression
Add warning to documentation for renamed method
Add link to release note page
Merge branch 'master' into develop

Conflicts:
	Gruntfile.coffee
	build/css/bootstrap-tour.min.css
	build/js/bootstrap-tour.min.js
	docs/assets/css/bootstrap-tour.min.css
	docs/assets/css/index.css
	docs/assets/js/bootstrap-tour.min.js
	docs/index.html