myna 0.3.1

LinkedIn signs in through a fixed HTTPS callback

LinkedIn only accepts absolute HTTPS redirect URLs, so the loopback address every other OAuth network can use was never going to work for it. The LinkedIn app is now registered with one URL, https://mynaposter.com/api/linkedin/callback, and every LinkedIn sign-in ends on that page, which shows the code to paste back into myna. The exchange still happens on your machine with the client secret. The login prompt no longer asks whether the browser is elsewhere, since for LinkedIn there is only this route, and its note says which URL to register on the app. (#7)

Full changelog: v0.3.0...v0.3.1