Added support for rubocop config

https://github.com/bbatsov/rubocop
add support for composer
Merge pull request #373 from kykim/master

add support for pass (http://www.passwordstore.org/)
Merge pull request #375 from iainbeeston/rubocop

Add support for rubocop
Merge branch 'composer' of github.com:fayland/mackup into fayland-composer

Conflicts:
	CHANGELOG.md
Merge branch 'fayland-composer'