Deprecate 'installer_*' targets. If used a warning is generated and the

Deprecate 'installer_*' targets.  If used a warning is generated and the
build will sleep for 10 seconds before continuing.

New way of doing targets: build what you want by specifying multiple
targets.  For example:  'make installer release' instead of
'make installer_release'.  This increases the flexibility of the
nrelease build by allowing us to add multiple targets to create an
enhanced result.