Merge pull request #1362 from pw374/master

update omd packages: add tags where they were missing
+mirage-types.0.2.0
mirage-types: add ocamlfind depend
Merge pull request #1364 from mirage/master

+mirage-types.0.2.0
+io-page-unix.0.1.0
+io-page-xen.0.1.0
io-page: fix build targets
io-page: add cstruct deps
Merge pull request #1365 from mirage/master

+io-page-unix.0.1.0
omd.0.8.2