Make grunt watch .less files
Move service tree specific less to own file
Import bootstrap less files
Add basic styling to service tree
Add info box to service tree
Change service tree buttons to anchor elements

Before this they were simply divs.
This change improves accessibility.
Disable mouse wheel events in Leaflet controls
Fix less indentation
Make navi controls scrollable
Make service 'links' more accessible
Merge pull request #7 from lraivio/master

Service tree styling