Add tagline to README
Add tagline to README

nruth/forem,szymon-przybyl/forem,szymon-przybyl/forem,nruth/forem,substantial/forem,dmitry-ilyashevich/forem,caffo/forem,substantial/forem,frankel/forem,caffo/forem,frankel/forem,dmitry-ilyashevich/forem