Improve MacOSX support by looking for the App Engine SDK in the standard location where it is installed (/usr/local/google_appengine). A local copy of the SDK within the project will still be preferred if it is present. 
Improve MacOSX support by looking for the App Engine SDK in the standard
location where it is installed (/usr/local/google_appengine). A local copy of
the SDK within the project will still be preferred if it is present. 



git-svn-id: 7c59d995a3d63779dc3f8cdf6830411bfeeaa67b@12 d4307497-c249-0410-99bd-594fbd7e173e

wtanaka/google-app-engine-helper-for-django,clones/google-app-engine-django