Compilation of Objects, Method, Dot, Colon

-Objects now desugared compiled, and can be acessed with dot/colon.
-Method compilation is done without the use of the method macro, avoids
the sweetening step for now
-Methods are now copile and can be applied correctly

-Added printout of exn stack and message on generated test failure
Merge branch 'nwo' of https://github.com/brownplt/pyret-lang into nwo

Merging with the work on capturing stack traces
Merge branch 'nwo' of https://github.com/brownplt/pyret-lang into nwo

Merging in brander and object compilation changes in runtime-anf

Conflicts:
	js/runtime-anf.js
mend