Update Travis env to check WP_VERSION=4.0 instead of 3.8
Add YUI_COMPRESSOR_CHECK to Travis
Add YUI_COMPRESSOR_CHECK and DISALLOW_EXECUTE_BIT to .travis.yml
Introduce PATH_INCLUDES var to limit scope of CI checks
Add PATH_INCLUDES restriction to PHPCS call in .travis.yml
Eliminate WP_MULTISITE=1 from Travis build matrix
Add support for .jshintignore
Attempt to break out before_script/script/after_script from .travis.yml to separate scripts
Add 'set -e' to new travis scripts
Do a source on travis.before_script.sh so env vars are available
Only check against PHP 5.5 (production ver)
Restore test in PHP 5.4, multisite; default path to dev-lib