Changed README to Markdown and added some information to it

README.md

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+# Mirror Checker
+
+This mirror status checker determines whether CSC mirror is up-to-date with upstream.
+
+## How To Run
+
+Run `main.py`.
+
+## Resources
+
+- [CSC Mirror](http://mirror.csclub.uwaterloo.ca/)
+- [Debian Mirror Status Checker](https://mirror-master.debian.org/status/mirror-status.html)
+- [Debian Mirror Status Checker Code](https://salsa.debian.org/mirror-team/mirror/status)

README.txt

@@ -1,5 +0,0 @@
-
-Resources:
-http://mirror.csclub.uwaterloo.ca/
-https://mirror-master.debian.org/status/mirror-status.html
-https://salsa.debian.org/mirror-team/mirror/status