* Updated the annotations for OCaml and Opam to 
  reflect the correct versions
* First Moana Irmin back_end implementation - 
very simplicty, plenty of room for future optimisations
* Added convertion from tuple to JSON and vice versa 
  - also relates to #5
* Added Test 10 - to test the Moana Irmin backend
* Updated the build file to include lwt and irmin packages
* Updated travis-sh with OPAM packages needed to build tests.
Update .travis-ci.sh

added irmin to the package list
- Added libgmp3-dev to fix compilation errors
Update .travis-ci.sh

More dependency libraries, for Travis to compile correctly - fingers crossed.
Update .travis-ci.sh
Update .travis-ci.sh
fixed warning 31: moana.ml was being linked twice. ocamlc allows this, but not ocamlopt -- for more background on this see http://caml.inria.fr/mantis/print_bug_page.php?bug_id=5461 ;