Proof of concept. Simplified refactored ProfileInstaller.

  This works. Next, remove all the unused cruft and simplify interface.

	modified:   ProfileInstaller.php
	modified:   examples/baseprofiles/standard2/standard2.install
	modified:   examples/baseprofiles/standard2/standard2.profile
Removed cruft from previous proof-of-concept SubProfile model.

 	modified:   ProfileInstaller.php

	deleted:    InstallProfile.php
	deleted:    Subprofile.php

	deleted:    examples/baseprofiles/example/
	deleted:    examples/subprofiles/

	renamed:    examples/baseprofiles/standard2/standard2.info -> examples/standard2/standard2.info
	renamed:    examples/baseprofiles/standard2/standard2.install -> examples/standard2/standard2.install
	renamed:    examples/baseprofiles/standard2/standard2.profile -> examples/standard2/standard2.profile
	renamed:    examples/baseprofiles/standard2/translations/README.txt -> examples/standard2/translations/README.txt
Fixed reference to private property.

 	modified:   ProfileInstaller.php
Added some documentation and updated @todos.

 	modified:   examples/standard2/standard2.install