Merge LVM snapshot plugin from development
add TemporaryDirectory to holland.core.util.path
Merge branch 'amsterdam' into refactor_lvm_plugins
cleanup imports
add .configspec to lvm's MANIFEST.in
cleanup lvm's setup.py
add archive API

- add an API for access to various archiving formats
Merge branch 'core_archive_api' into amsterdam
Merge branch 'amsterdam' into refactor_lvm_plugins
various archive plugin api bugfixes
add standard namespace to base ArchiverBase plugin
register builtin archiver plugins with plugin_registry
Merge branch 'core_archive_api' into amsterdam
Merge branch 'amsterdam' into refactor_lvm_plugins
cleanup list-plugins output
Merge branch 'cleanup_list_plugins' into amsterdam
Merge branch 'amsterdam' into refactor_lvm_plugins
use correct configspec api in mk-config
Merge branch 'amsterdam' into refactor_lvm_plugins
change copytree -> dircopy for lvm archive config