Added TODO file

TODO.txt

@@ -0,0 +1,9 @@
+1. Finish README.md
+
+2. Add command-line argument support:
+	1. Specify IP version in arg
+	2. Specify local hostname:port in arg (enclose in paranthesis if IPv6)
+	3. Specify remote hostname:port in arg (enclose in paranthesis if IPv6)
+	4. Try making every aspect of the program configurable via args
+
+3. Add support for configuration files, which can be specified via a command-line arg