Mention ./install-jslibs.sh in README
Mention ./install-jslibs.sh in README

I had adjusted the Makefile, but forgot about the README. Fixes #18.

DeepSpawn/incredible,rampion/incredible,psibi/incredible,nomeata/incredible,rampion/incredible,wirebirdlabs/incredible,wirebirdlabs/incredible,eccstartup/incredible,eccstartup/incredible,eccstartup/incredible,wirebirdlabs/incredible,nomeata/incredible,nomeata/incredible,rampion/incredible,DeepSpawn/incredible,DeepSpawn/incredible,psibi/incredible,psibi/incredible