preparing 2.1.2

--HG--
rename : opam/ocamltter.2.1.1/descr => opam/ocamltter.2.1.2/descr
rename : opam/ocamltter.2.1.1/opam => opam/ocamltter.2.1.2/opam
rename : opam/ocamltter.2.1.1/url => opam/ocamltter.2.1.2/url
preparing 2.1.2
Added tag 2.1.2 for changeset c6a011b90a37
merged with 2.1 head