Some simple, very-ugly hacks for "supporting" long and unicode literals

Just convert them to ints and strings, failing if the conversion isn't possible.
Unicode and str are the same thing, right? :/
Merge branch 'delattr_by_hcls' of https://github.com/xiafan68/pyston into personal

Merges #101

Conflicts:
	src/codegen/runtime_hooks.h
Slightly change delattr behavior and messages

Not worth producing CPython's error messages exactly: some delattr
messages depend on whether or not the object has a __dict__ allocated
or not.  Just canonicalize those in the tester.
'del name' support

Ended up not being too bad, except for some more fun around classdefs
having different rules, and making sure to generate the correct error
type and messages.
Some basic frozenset support

Just do it by putting a different class object on the same C-level structure.
Not too hard right now to defeat the frozen-ness, please don't try.
Some basic support for the two-arg raise statement
Merge branch 'master' of https://github.com/dropbox/pyston into generators

Conflicts:
	src/codegen/compvars.h
	src/codegen/runtime_hooks.h
	src/runtime/objmodel.h
Generator: implement basic review comments