Moving mozrunner and simplejson to a toplevel location.

To help our licensing scripts understand the layout
of the project, moving things out of pylib directly into

Also renaming README to README.nacl

As this location is DEPSed into nacl and then into chrome,
several follow-on CLs will be required to complete the move.

Review URL:

git-svn-id: svn:// fcba33aa-ac0c-11dd-b9e7-8d5594d729c2
7 files changed