Append current issues to README

[natebass]

It would be nice to have this project, code4sac/projects, be at the top of the list at github.com/code4sac. Right now it's way at the bottom and says "Updated on Aug 14, 2015". This is because a file needs to be changed to make the project "update".

My idea is to listen for every time an issue is created or commented on and then bump up that issue on a list in the README file. It could look like this:

---

Current Projects

1. WALKSacramento Project [Proposed 2/15/17]
2. OSMnx: X-Ray Sacramento's Street Network
3. Up to twenty?

---

Further reading:
https://developer.github.com/webhooks/

[natebass]

I implemented this as an Azure Function. The code is not on GitHub but it could be.

Try it out by creating, deleting, and commenting on any issue at https://github.com/natebass/natebass.github.io/issues

[natebass]

There is a bug with the regular expression matching the list.
Here is an example: http://regexr.com/3fm79

Fixed: You can try ## Current Projects[\s\S](\s{2}\d.*[\s\S])* on the example text.

[natebass]

This is now working; as far as I can tell. Let me know your guys' feedback and if it is something you think we should use for the codeforsac/projects repository. @joelrip @KalebClark