Merge pull request #2 from seegno/bugfix/gulp-binary-path

Add gulp binary check for process.cwd node_modules
changelog
Update README.md
Add harmony support
Merge remote-tracking branch 'origin/bugfix/resolve-custom-config-path'
Merge remote-tracking branch 'origin/enhancement/db-options-custom-logger'
Merge remote-tracking branch 'origin/enhancement/add-harmony-support'