Implement defineOwnProperty
Incorporating the changes of defineOwnProperty
Implement defaultValue
created a binding for function calls
minor touch up to this binding addition
working on built-in functionality
added glue for most Function, Number, String, and Boolean built-ins
Merge pull request #6 from jray319/master

Removed ambiguity and some fix.
Merge pull request #7 from tshull226/master

this binding for function calls
working on built-in functions
Merge branch 'master' of https://github.com/daejunpark/javascript-semantics
Merge branch 'work'

Conflicts:
	js.k
Incorporating the previous merge
Add hoisted version of toy programs