Add a todo

todo.md

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+# TODO
+
+## Input protocol
+* [ ] document input protocol
+* [ ] document protocol as regexp
+
+## Test framework
+* [ ] enable TDD
+* [ ] automate build and test
+* [ ] type of target (cross compile) ?
+
+
+## Input processing
+* [ ] Read the file into array
+* [ ] Parse every line
+* [ ] Load structured data
+* [ ] Create structured data storage