Add some stable packages

Only have to wait for opauth/flickr to tag a release (https://github.com/pocket7878/opauth-flickr/issues/4)
Merge pull request #7 from barryvdh/patch-1

Add some stable packages
Update opauth config

The path was a bit strange as a default?
Tweaked the callback for the example (coming in next commit)
Security salt is now the same as the default in opauth, because this is checked. This forces people to change the key.
Fix config

Wasn't namespaced, so never called, so the config wasn't used.
Update readme

Was missing some information. Added service provider/facade/config (which might be obvious to some).
Also, the instance example couldn't be used, because it requires the app container in construct, not the key/secret.
And the auth example also didn't work. Can you pass an array of routes? I didn't think so.
Made the post/get callback to the same url.
Also, the `Flickering::getOpauth();` didn't return a response object, but just sets the headers (I think), so an exception was shown briefly, before being redirected.
Merge pull request #10 from barryvdh/patch-4

Update readme
Merge pull request #9 from barryvdh/patch-3

Fix config
Merge pull request #8 from barryvdh/patch-2

Update opauth config
Update opauth/flickr requirement
Merge pull request #11 from barryvdh/patch-1

Update opauth/flickr requirement
Update CHANGELOG.md
Update composer.json
Merge pull request #13 from GrahamCampbell/patch-1

Update composer.json
Fixes issue caused by Flickr removing support for non-HTTPS connections (mentioned in issue #14)
Merge pull request #15 from ecaron/force_ssl

Fixes issue caused by Flickr removing support for non-HTTPS connections ...
Update CHANGELOG.md
Merge remote-tracking branch 'upstream/master'