static: Fix 'make distcheck' and verify-checksums interaction

Closes #578
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
web: There's no avatar or computer name on the login screen

So this code is a noop.

Closes #583
Reviewed-by: Marius Vollmer <marius.vollmer@redhat.com>
Release version 0.8
data: Move contents of data/ directory to the relevant src directories

These are bits relevant to the various components of cockpit. Move them
to the src/ directories.
ws: Fix 'make install-test-assets'

Closes #579