Support loading of compiled functions off byte arrays

[ehuelsmann]

loadCompiledFunction() in Lisp.java loads bytes out of a file, then loads the "class-bytes" off the resulting byte array. The result being a loaded class.

The goal of this issue is to expose this interface in order to eliminate the need for the compiler to write compiled functions out to files before loading them into the JVM.

[ehuelsmann]

This has been implemented by Alessio Stalla: closing fixed.