Add view of \license information in Doxygen information and add an
overview page for \fixme which is used in source code.
We have Bug List, Fixme List, Todo List and Deprecated List. Do we have
some other tags we use that we could collect and display?
This removes around 14MB and can get easily generate locally by
doxygen util/Doxyfile when needed.
Restructured .gitignore a bit and some additions like zotshrc, etc.
Fixed a typo in doc/main.bb