updated readme.
added api driver config and bumped firefox version number.
renamed behat yaml file.
added addl. instructions re:behat.yml to README.
added behat.yml to git ignore list.
bumped up FF version number.
added api driver configuration.
added placeholder substitution step for behat to travis ci config.
added phpunit to composer requirements.
recreated composer lock file.
implemented step definitions. added kludge to make logged-in check pass.
added feature for testing permissions.
dropped PHP 5.3 from test matrix
Merge branch '7.x-1.x' into behat_tests
added code comments.
declared 'admin menu' region.
worked on permission check step definitions.
Fleshed out permissions check scenarios.
replaced symlinking with copy commands.
defined 'Admin Menu' region in behat config for travis.