Added binding to ZBar.
Binding to libqrencode.
Fixed qrencode.
Adding depopts.
Fix things up.
Normalize the repository by running `opam-admin check -n`

This makes the repository format compatible with OPAM 1.1 only.
Merge pull request #1302 from vbmithr/master

Added binding to ZBar.
Add external dependencies for Ubuntu and Debian.

These depexts can be queried via `opam install -e ubuntu <pkg>` to
let external helper scripts satisfy OS dependencies before starting
the installation.
Aio: add ubuntu depext tag
Alsa: add depexts for Ubuntu/Debian (#1304)
Ao: add depexts for Ubuntu/Debian (#1304)
ssl: add ubuntu/debian extdep (#1304)
bitstring: add time depext for ubuntu/debian (#1304)
Ao: fix depext name
Cryptokit: add Ubuntu/Debian depexts (#1304)
lablgtk: add Ubuntu/Debian depexts (#1304)
Mysql: add depexts (#1304)
omd 0.7.0
Merge pull request #1305 from pw374/master

omd 0.7.0
sequence 0.3.7