todo: GCS
added GCS, no GLOBALS, two methods for saving pastes and comments
use GLOBALS for verbosity again
added getAllPastes() to all storage providers
moved to bin, added --delete options, make use of $store->getAllPastes()
added --delete-* options to help
longopts without -- *sigh*
fixed arguments
drop singleton behaviour to allow multiple backends of the same type simultaneously
remove singleton from Model, collapse loop in migrate.php
comments is not indexed
tests without data singleton
fix
exit if scandir() fails
extended meta doc
