Rework depedency management in premake lua scripts

tools/scripts/including.lua

@@ -0,0 +1,20 @@
+-- Functions for including projects
+Includes = {}
+
+function Includes:create()
+
+    list = {
+        handles = {}
+    }
+
+    function list:handle(name)
+        if self.handles[name] == nil then
+            self.handles[name] = true
+            return true
+        end
+
+        return false
+    end
+
+    return list
+end