Migrate "Introduction to Hyperledger" from EdX to Markdown

[tkuhrt]

As part of our effort to create a second revision of the LFS171x EdX course, migrate the chapter "Introduction to Hyperledger" to a markdown file located at ./LFS171x/docs/introduction-to-hyperledger.md in the import-edx-content branch.

[nathalie-ckc]

I would like to sign up for this issue. I don't have permissions to assign it to myself.
-Nathalie

[tkuhrt]

Hi, @nathalie-ckc. This particular issue has already been merged, and it should have been closed. I will do that now. We would love to have you sign up for another issue https://github.com/hyperledger/education/labels/edx-migration. Let me make sure that you are part of the organization so that you can assign an issue to yourself.

[tkuhrt]

Wasn't really completed. Sorry for the confusion. Re-opened.