Added tests for Category, Information, Manufacturer and Product models in catalog.
Added test for checkout/cart/add method, added output getter to Response class.
fix to Url test.
Changed spaces to tabs.
Added test for reviews.
moved tests folder outside upload folder.
missing files.
Deleted SQL file in the tests folder.
Merge branch 'master' of https://github.com/opencart/opencart
removed tests.
Ported PayPal's and Amazon Payments' buttons to 2.0
Merge branch 'master' of https://github.com/opencart/opencart
Merge pull request #1408 from Martynas-P/master

Update PayPal's and Amazon Payments' buttons