Added .appengine to import.
Fixed tests so differences in python lib path are eliminated.
Simplyfied. Removed a lot of constants.
The zip_path attribute moved outside the run method.
Fixed a bug when _download_gae() was passed an unexpected argument.
Updated the version to 1.9.12.1.
Added rst substitution for version.
Moved the version replacement outside the link.
Addec checksum.
Moved the checksum backticks to the substitution.
Added version suffix
Removed period from versionsuffix.
Version, full version and checksum are now parsed from README.rst substitutions.
Merge branch 'master' into gae-sdk-1.9.10

Conflicts:
	README.rst
	setup.py
	version.py