Bump clang to 3.4, Integrate latest ark cookbook

Notes about upgrading ark cookbook:

 - clang-3.4 tarball for Ubuntu 12.04 was this time released as `tar.XZ`
   package, which forces to upgrade ark cookbook dependency (COOK-2771).
 - Chef 11 is required by ark cookbook >= 0.2
 - the correct integration of other cookbooks (android-sdk::default and
   firefox::tarball) that depend on `ark` were also verified.
Update ElasticSearch to 1.1.0
Merge branch 'gc-clang-3.4'
Merge branch 'bump-es'
Update changelog
Java cookbook: install 'unzip' package

Useful for isolated testing, if `unarchivers::default` is not part of
the run-list.
Update CHANGELOG (last minute, last call,...)
bump perl versions
Support Erlang 17.0 with kerl

Also drop support for the previous Erlang 17.0 release candidates.
Merge pull request #293 from josevalim/patch-2

Support Erlang 17.0 with kerl
Support ghc-7.8.1 travis-ci/travis-ci#2151
Merge pull request #294 from dmalikov/master

Support ghc-7.8.1
handle deb7 appendix in ghc-7.8.1 tarball url
Merge pull request #295 from dmalikov/master

handle deb7 appendix in ghc-7.8.1 tarball url
Use ghc-7.8.2 instead of 7.8.1
Merge pull request #296 from dmalikov/master

Use ghc-7.8.2 instead of 7.8.1
Set PYTHON_CONFIGURE to build a UCS4 build
Merge pull request #297 from dstufft/set-configure

Set PYTHON_CONFIGURE to build a UCS4 build
when amending the haskell download url, check for all 7.8 versions
oops, need to switch ~ and = around