Enable zero-config with a specified admin and username.  Makes for full install on zero-config.
updates to undo unnecessary changes
Merge branch 'develop' of github.com:learningequality/ka-lite into zero_config_admin

Conflicts:
	kalite/management/commands/install.py
Merge pull request #779 from bcipolli/zero_config_admin

HTH: Enable zero-config with a specified admin and username.  Enables full install on zero-config.