start on collector for local variables

lib/melon/compiler/locals_collector.rb

@@ -0,0 +1,24 @@
+module Melon
+
+  class LocalsCollector < TotalProcessor
+
+    def initialize
+      @locals = {}
+    end
+
+    def collect(statement)
+      process statement
+      @locals
+    end
+
+    def on_lvasgn statement
+      add_local( statement )
+    end
+
+    def add_local(statement)
+      var = statement.children[0]
+      @locals[var] = :Object #guess, can maybe guess better
+    end
+
+  end
+end