[skip ci] Update README to link directly to files on Bintray
[skip ci] Update README to link directly to files on Bintray

Former-commit-id: fbf05a9e4d89c09ab2452444176ddb12328b187b
peteruhnak/pharo-vm,bencoman/pharo-vm,bencoman/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,bencoman/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,peteruhnak/pharo-vm,bencoman/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,bencoman/pharo-vm,bencoman/pharo-vm,peteruhnak/pharo-vm,timfel/squeakvm,peteruhnak/pharo-vm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,bencoman/pharo-vm