GAM 3.4

• Support for creating and setting custom user schemas http://goo.gl/M9rQrI
• End user view of print users and user info commands.
• fix updating name/description for groups
• fix groups sync commands
• gam print groups members no longer fails on zero member groups
• make sure downloaded Drive file names are safe for OS filenames.
• gam info domain should no longer crash on getting customer ID
• other minor bug fixes