xe.0.6.0: remove unneeded dependency on ounit

Signed-off-by: David Scott <dave.scott@citrix.com>
Add xe.0.6.1 (where the _oasis constraints match the opam constraints)

Signed-off-by: David Scott <dave.scott@citrix.com>
Remove xe.0.6.1 in favour of 0.6.2

It turns out 0.6.1 was tagged from the wrong branch, d'oh

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #1929 from djs55/xe.0.6.1

Add xe.0.6.1 (packaging fixes)