-updated README.md

-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

dub.json

@@ -1,6 +1,6 @@
 {
 	"name": "bubel_ecs",
-    "targetName" : "ecs",
+    "targetName" : "bubel_ecs",
 	"authors": [
 		"Michał Masiukiewicz", "Dawid Masiukiewicz"
 	],