Added the token api_auth type

[Jack12816]

Hey guys, first things first: thanks for this great gem!

It would be quite useful to have a new token authentication type,
which follows the Rails convention. So the Authorization header
looks like this:

Authorization: Token token="WCZZYjnOQFUYfJIN2ShH1iD24UHo58A6TI"

This PR allows the usage of this authentication.

[grape-bot]

	1 Message
📖	We really appreciate pull requests that demonstrate issues, even without a fix. That said, the next step is to try and fix the failing tests!

Generated by 🚫 danger

[dblock]

Something's wrong with the build. Care to fix that? Probably needs some capybara updates and what not. I can merge on green.

Generally this auth business implementation is weird. Swagger ui has a much more sophisticated way to do this in 3.0, someone will have to redo it I think when we get there. There's also a more generic way to handle this via preFetch (eg. artsy/doppler#139).

[olleolleolle]

master should build now, so this PR could be re-based to re-run it.

[dblock]

@Jack12816 Rebase/squash? I'll merge.

[Jack12816]

Sorry guys I didn't have time to look into the broken build. But I rebased against the latest upstream master right now. Feel free to merge :)

[Jack12816]

@dblock Is there a release planned for this?

[dblock]

I opened #93 for the maintainers of this repo. I am just cheerleading.