New version of vhd-format, vhd-tool, tar-format, nbd
s/ocaml/OCaml/
lablgtk and sourceview: add troubleshooting post-messages and fix depexts

Not sure if we want to enable this automatically to print hints using the depexts. Could be
nice but we need a reliable way to know the distribution, and what would be the fallback ?
nbd: add dependency on cmdliner

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #1327 from AltGr/refs/heads/lablgtk-postmessages

lablgtk and sourceview: add troubleshooting post-messages and fix depexts
Fixed deps of ocaml-top (non compatible with latest ocp-inde* releases)
Add ocaml-top 1.1.1 (compat release)
Merge pull request #1329 from AltGr/fix-ocaml-top-compat-try2

it seems travis got confused...
Add ibx.0.6.1
Declare that js_of_ocaml is not compatible with compiler version 4.01.0

See the js_of_ocaml [issue](https://github.com/ocsigen/js_of_ocaml/issues/37?source=cc)
Move ibx.0.6.1 to packages/ibx
Merge pull request #1330 from olgu/ibx

Add ibx.0.6.1
Merge pull request #1331 from pveber/patch-2

Declare that js_of_ocaml is not compatible with compiler version 4.01.0
Merge pull request #1321 from djs55/vhd.0.6.4

New version of vhd-format, vhd-tool, tar-format, nbd
+ extlib 1.6.0
Merge pull request #1333 from camlunity/master

+ extlib 1.6.0
Declare that js_of_ocaml 1.3.1 is not compatible with compiler version 4.01.0
Merge pull request #1334 from pveber/patch-2

Declare that js_of_ocaml 1.3.1 is not compatible with compiler version 4.01.0
Declare that js_of_ocaml 1.2 is not compatible with compiler version 4.01.0
Merge pull request #1336 from pveber/patch-2

Declare that js_of_ocaml 1.2 is not compatible with compiler version 4.01.0