add 'copy' argument to put password into clipboard

Works like 'get', but uses `xsel` to copy the first result to the
X CLIPBOARD selection and produces no output on success.
put version data into separate file

Otherwise using setup.py to install won't work if not all dependencies
are already installed, as the import of yspave.pave relies on them.

Also bumped the version number there to 0.0.8 as in the git tag and the
PKGBUILD.
add xsel dependency to PKGBUILD
Merge branches 'metadata' and 'xsel'
fix typo
add config option & print table on multiple results

print a table without passwords when a query returned more than one item from
the database and let the user choose from them, if there is only one result it
is silently copied
also restore original Commands.get and add a new Commands.copy instead
add optdependency to PKGBUILD
Merge branch 'xsel'

Conflicts:
	dists/PKGBUILD
fix permissions on database backup
add words to optdepends in PKGBUILD
Merge branch 'fixes'
Merge pull request #1 from ponderstibbons/master

Use xsel to copy password to X clipboard and put version & name into separate file