Added new message resonse app base files.
merged changes from master
need to move to a different computer, not a functional commit.
Update app.py
restructured the response app
wrote responder, need to test.
created tests for Responder app
Merge branch 'master' into response_app

Conflicts:
	sim/settings.py
Parser now correctly handles HE, which takes an opcode as an argument.
"WO" code was broken because of O -> 0 translation. Changed opcode to "RE".