Add missing object arg, opt thisArg to Array methods. Fixes gh-283

NOTE: forEach thisArg to be implemented in follow up commit

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>
Merge branch '283' of https://github.com/rwaldron/runtime into rwaldron-283

Conflicts:
	src/colony/lua/colony-js.lua
Reverts forEach implementation from C to Lua.