Merge pull request #2188 from nojb/master

Add ocaml-gsasl 0.10.0 & conf-libgsasl.1
Merge pull request #2189 from nojb/master

Add ocaml-imap 0.10.0
Add gdal 0.6.0
Merge pull request #2191 from hcarty/gdal-0.6.0

Add gdal 0.6.0
Add ocaml-dht 0.1.3