making apm_package_instance_new the canonical proc for instantiating a package. Deprecating the create_package proc. Adding apm_mark_packages_for_bootstrap that will is used to schedule all necessary files for reload after a set of applications have been installed. Extracting apm_mark_files_for_reload from apm_mark_version_for_reload so that the functionality of scheduling files for reload could be reused.
adding support for Tcl proc package callbacks. Currently only supporting after-install and after-instantiate callbacks (next up is after-mount). There is no UI yet.