made collapsed version of navigation and added close button and tooltips
code cleanups
made multiple css and small js adaptions
added events to minified navigation
adapted positioning of column-options
merged conflicts from develop
removed footer margin when collapsed
added demo; change requests; merged with develop
build new version
Merge pull request #147 from massiveart/feature/navigation-collapsed

made collapsed version of navigation and added close button and tooltips
fixed merge conflicts