new method of pack loading, assume data or data.btw in root to point to all other

apps/lua/data/packs/data.toml

@@ -0,0 +1,3 @@
+[[deps]]
+source = "../../common-data" # where does it come from, might be an url
+name = "common-data"         # should be globally unique

apps/lua/data/twn.toml

@@ -0,0 +1,11 @@
+[about]
+title = "Lua Townengine!"
+developer = "Somebody"
+app_id = "twnlua"
+dev_id = "somebody"
+
+[game]
+base_render_width = 640
+base_render_height = 360
+
+[engine]