-fixed shaders for GL2
-added Entity selection tool
-throw out tools from "Demo" window to "Tools" window
-change ComboBox to Tabs for Tools
-Added more verbose tips
-Improved and fixed BrickBreaker collisions
-fixed simple DUB issue
-Add all required packages as wrap dependencies
-Move source lsitnings to separate files
-Proper dependencies declarations
-Set global D compiler arguments
-Add few asserts
-Add test exe
-Other small improvements
Tested with dmd with betterC, demos executable has to be run from 'demos' directory to properly load assets.