Revert "Version sm4"

This reverts commit 7fd23a35717668c2ceea5a39e3f68ef443305097.
Revert "Fix the emitter to use json package instead of simplejson"

This reverts commit f9997f041650035bacbd0beb05276a516fe4c6ae.
Revert "Support rc.* responses on django 1.5"

This reverts commit 531280ab99742c35b490736aafd43402c067cf9f.