readme: formatting + added binprot in the list of supported extensions
readme: formatting + added binprot in the list of supported extensions

rgrinberg/merlin,the-lambda-church/merlin,dra27/merlin,fxfactorial/merlin,dra27/merlin,ocaml/merlin,dra27/merlin,the-lambda-church/merlin,dra27/merlin,haselwarter/merlin,rgrinberg/merlin,chambart/merlin,ocaml/merlin,rgrinberg/merlin,fxfactorial/merlin,neojski/merlin,fxfactorial/merlin,the-lambda-church/merlin,ocaml/merlin,chambart/merlin,haselwarter/merlin,haselwarter/merlin,neojski/merlin,chambart/merlin,neojski/merlin,fxfactorial/merlin,chriskonstad/merlin,rgrinberg/merlin,ocaml/merlin,chriskonstad/merlin,neojski/merlin,haselwarter/merlin,chambart/merlin