Added a short TODO list

TODO.markdown

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+# TODO list
+
+* Fix the hash test
+
+For some stupid reason the transfer hash testcase will not succeed :(
+I probably lack sufficient knowledge and patience to figure out what is going wrong with the different charsets involved
+
+* Add compliant scrape support: http://wiki.theory.org/BitTorrentSpecification#Tracker_.27scrape.27_Convention
+
+Replace current statistics interface with it
+
+* Add / Test multiple tracker support against a single redis backend
+
+Better scalability, yeah
+
+* Add scripts to generate torrents and push them to the tracker / seeders
+
+Nicer for other people working with this
+
+* Add generic multi level swarm support
+
+It should be possible to do multi-level swarms fairly easy, we have not yet found a use for that
+But larger shops might want to resort to something along the lines of a Global-Swarm -> DC-Swarm -> Rack-Swarm
+
+* Add plugin system for group classifiers
+
+The current group classifier for nodes is crude and tied to our specific implementation of a metadata service for nodes
+in our environment. Reimplementing this as a plugin system would make it more usable for others and allow easy
+development of plugins.