Added pre_execute, execute and post_execute to modules.

git-svn-id: https://beef.googlecode.com/svn/trunk@1197 b87d56ec-f9c0-11de-8c8a-61c5e9addfc9

core/main/command.rb

@@ -170,6 +170,9 @@ module Core
         JSON.parse(command['data']).each{|v|
             cc[v['name']] = v['value']
         }
+        if self.respond_to?(:execute)
+            self.execute
+        end
         @output = @eruby.evaluate(cc)
       
       @output