Added building component, refactored components to have setup, draw, update and tick methods, added fencing for building construction area parimeter, misc other changes.

lib/components/build_queue.rb

@@ -1,9 +1,7 @@
 class IMICRTS
   class BuildQueue < Component
     Item = Struct.new(:entity, :progress)
-    def initialize(parent:)
-      @parent = parent
-
+    def setup
       @queue = []
     end