Adds a TODO file

TODO.md

@@ -0,0 +1,8 @@
+== TODO file for libdsm
+
+This TODO list is _far_ to be exhaustive but contains a few stuff that must be
+done and i must not forget about.
+
+* Replace OpenSSL by Public Domain code or libgcrypt
+* Make libdsm work :D
+* Refactor and make this code readable