+feature only files under focus shown, little fixes
show Files under many folders
drill down and remove folders
changed drill_down_at_focus to create new treemap_from
+ reload filesystem + create parent treemap
merge controller in master
mouse in 2D deactivated
+tutorial
Merge branch 'master' into treemap-core
+ keyboad element selection, *fix show files under focus
Merge branch 'master' into controller
+out-view with rotation
+zooming in overview
*outview fixed with transitions