introduce Typeform OAuth provider

[stefann42]

per docs at https://developer.typeform.com/get-started/applications/

[stefann42]

Only the last three commits are relevant (775f6ee, 116ba17, fd4cc81). The first four commits have already been merged into upstream repo with a previous pull request and were auto-included by the Pull Request process probably due to past history. I should probably rebase and merge my repo with upstream.

[TerribleDev]

Thanks for your PR

[stefann42]

Great! Do you know how am I supposed to pull/merge with your upstream repo from my form in order for future PRs not to include my entire contribution history? There seem to be multiple methods discussed at https://stackoverflow.com/questions/3903817/pull-new-updates-from-original-github-repository-into-forked-github-repository

[TerribleDev]

git remote add upstream https://github.com/TerribleDev/OwinOAuthProviders.git
git fetch --all
git checkout master
git reset --hard upstream/master
git push origin master --force

[TerribleDev]

usually in my forks I will do the work for a PR in a separate branch in my fork so my master can be updated with just a:

git checkout master
git pull upstream master
git push origin master

[stefann42]

Thanks, makes sense. I'll start doing that from now on.

[TerribleDev]

Np, git is the result of super smart engineers making a tool....the user experience is less than ideal, and you can easily shoot yourself in the foot.