Cleanup security.hoisted.js
exploring array implementations
Merge branch 'tom_demo' of https://github.com/tshull226/javascript-semantics into tom_demo

Conflicts:
	toy-programs/curry.js
Merge remote-tracking branch 'tom/tom_demo' into work
Added a test program to show an arguments object.

(cherry picked from commit 26cb9e69587070094fbe31fb8150d7cd52f74bf4)