add a recipe for installing firefox from binary
Use 'ark' LWRP to install firefox binary tarball

Note: I manually removed 'useless' and 'noisy' files from ark-0.1.0.tgz
(e.g. .gitignore or test artifacts strangely stored in `files`
subdirectories).
Firefox tarball: Install required apt dependencies
Cosmetic: Apply 'tarball' naming convention

Similarly to other tarball cookbooks like clang, gradle, kestrel and neo4j-server
Merge pull request #193 from travis-ci/jk_firefox_from_binary

add a recipe for installing firefox from binary