Changed version scheme (now used semantic versioning).
Update url link with tag version.
Merge remote-tracking branch 'upstream/master'
Used archvive/checksum instead of git.
release 0.4.4 of oasis
Sync latest compiler pull requests
Merge pull request #1831 from bactrian/sync-prs-1395823693

Sync OCaml compiler PRs
Merge pull request #1830 from UnixJunkie/oasis_0.4.4

release 0.4.4 of oasis
Merge pull request #1820 from sagotch/master

Used semantic version.
Upgraded websocket.
Add binary compiler for 4.01.0 by OCamlPro
Merge pull request #1833 from vbmithr/master

Upgraded websocket.
fix removal of typerep
Merge pull request #1834 from lefessan/4.01.0+bin-ocp.comp

Add binary compiler for 4.01.0 by OCamlPro
Merge pull request #1835 from janestreet/master

fix #1826
+uri.1.4.1