Fix dev mode: hljs is now always minified

There is no normal version of hljs.
Remove settings-trigger in dep_tree/settings
Change icons compact and widen to align better with focus icnos
Merge pull request #488 from latin-language-toolkit/remove-tree-settings-wheel-icon

Remove tree settings wheel icon and replace symbols
Add lodash which can be accessed with _.
Add deselect button to tree.
Add tooltip.
Add angular ui utils
Extract tokenSelector directive
Fix wrong merge conflict resolution by deleting marked
Renaming
Display of debugging info
Fix checked logic
Just use one watch instead of many functions
Move selector to left

Tree controls and focus settings have wrong position.
First version of dropdown to select tokens
Update selected item according to selection changes
Hack to place settings and controls on the top right
Gui prototype of selection buttons

This is an alternative to the mega control for selection and display
of unused tokens. The advantage is that it shows all information
at a glance and is not so complex. The disadvantage is that it
probably needs more screen estate and doesn't scale to a larger
number of possible selections.
Add functionality to new selector