QuickJS and maintenance

[Karl Dahlke]

If quickjs were packaged, we would need to change the makefile, as it 
currently assumes it has been built statically in parallel. 
In other words, we would simply link to it as we do with curl and 
readline etc. 
We might need an environment flag or parameter or something conditional 
in the makefile, 
to snag the library from it's standard place if it is there, or from a 
parallel directory if we had to build it. 
Then we should update the corresponding paragraph in README, on what is 
going on.

Karl Dahlke