Update readme
Update readme

Signed-off-by: Christoph Kleine <31da8eadd3e08b4765681520875d9858d60dbfa2@gmail.com>

muelletr/ultimate-reference-management-software-comparison,muelletr/ultimate-reference-management-software-comparison,muelletr/ultimate-reference-management-software-comparison,muelletr/ultimate-reference-management-software-comparison,muelletr/ultimate-reference-management-software-comparison