Load support

[rubenbarroso]

In the REPL, (load ) uses the IntelliJ's running path to look for the source to load:

(load "test.scm")
Error in load: error opening 'file:/Applications/IntelliJ IDEA 10 CE.app/bin/test.scm'.

It is not clear what directory to use for this. It seems that Guile and Racket support setting a load path, see "Source Loading" section in http://sisc-scheme.org/manual/html/ch05.html

This needs further investigation.