Limerick

    * Add ratio shorthand to floating point patterns @yaxu
    * Support fractional scales, add Arabic scales @quakehead
    * Additions to tidal-parse including support from overgain, overshape adn rot @dktr0
    * Move prompt-cont setting to end of BootTidal.hs (older versions of Haskell crash out at this point) @ndr-brt