rename json to pycket_json
reuse pypy's json parser (in somewhat hackish ways)

much faster untranslated. fixes #63
Add logger stub.
More variable-reference work.
WIP: remove assignment-conversion for module references.
Fixup varref.
fixup modvar.
Fix previous changes.
Fix weird translation error.
Revert "Fix weird translation error."

This reverts commit 1411416d4d86972741ee359d9438e02428877541.
dammit
Fix assignment-conversion.
Remove trailing whitespace.
Add a test.
Make rpython happy.
Merge branch master into structs
Add module-path?
Add test for cross-module mutable references.

Closes #64.
Add more tests for chaperones/impersonators
Merge branch 'master' of https://github.com/samth/pycket