lightweight Erlang with package management

[Christophe Romain]

> I hope there would be an easy way to use erlrt as its own stand-alone
> installation of Erlang.

you can do that already. let say you want yaws and mnesia+tv in two 
separates installations of erlang.

$ sh install_erlrt.sh
 > erlrt:install(yaws).
 > q().
$ mv erlrt erlrt-yaws
$ sh install_erlrt.sh
 > erlrt:install(tv).
 > q().
$ mv erlrt erlrt-mnesia

you have now erlrt-yaws/start.sh and erlrt-mnesia/start.sh, both 
starting the correct environment.