Added "clustering" chapter to README.md
fix of "<" and ">" in README.md
Long lines were wraped in "Recommended configuration"
fix of 1521de342a18be8eb337bb3fb3c193984b9a7713
refix of 1521de342a18be8eb337bb3fb3c193984b9a7713
"Known building issues" update
options deduplication in proposed fallback building method in README.md
forgot to deduplicate "-Wall" :)
Updated contacts information in README.md