Set up golangci-lint linter based on gometalinter

[ginywiny]

Test HIGHLY based on test-gometalinter, as it is used to lint the same files, except where golangci-lint is used instead of gometalinter.

Note: When golangci-lint uses the --skip-files flag, it still lints the file, but simply doesn't display the linting results. Lastly, older version of the test was linting individual .go files instead of .go, but this ran a lot slower. For this reason, .go is used instead.

Comments and TODOs from the previous gometalinter test file were kept in case new linters are being used.

• Update make deps script to install golangci-lint
• Create golangci-lint script based on test-gometalinter, create logic to entirely skip files without using golangci-lint skip flag
• Update test script to run test-golangci-lint

[purpleidea]

Looks like lots of tests are failing, and this is nine commits... I think you probably want to squash this down a bit =D LMK if you're not sure why the tests are failing.

Cheers!