io-sim: generalise selector types (io-sim-1.5.1.0)#199

coot merged 2 commits intorelease/io-sim-1.5.0.0input-output-hk/io-sim:release/io-sim-1.5.0.0from

coot/select-events-1.5.0.0input-output-hk/io-sim:coot/select-events-1.5.0.0Copy head branch name to clipboard