Method to convert cm to screen pixels
Typo: builUI -> buildUI
Base panel for navigation and contextual panel
Navigation and selection context panel
Base view that puts everything together
BaseView test
Renamed cmToPixels
Renaming
Merge pull request #814 from anserran/glass

Added base view to support new layout structure
Adds ScalePanel as a panel with a scaling animation.
PanelOverActor: a ScalePanel that is positioned on top of an actor. Also adds a test.
DropDown now uses a PanelOverActor when is opened.