Merge pull request #3 from pedrobaeza/purchase_discount-fix

[FIX] purchase_discount: Problems installing module
7.0 metafiles
OCB branch also in tests.
Merge pull request #7 from pedrobaeza/7.0-metafiles

7.0 metafiles
autopep8 lint
manual lint
Merge pull request #19 from lepistone/7.0-lint

7.0 lint
Merge remote-tracking branch 'origin/7.0' into 8.0

Conflicts:
	.travis.yml
	README.md