Allow modules with list names on command-line

[Zipheir]

Please allow modules to be imported on the command-line (e.g. with -R) by their list names. This is currently impossible; if I want to import (srfi 160 u8), for example, I have to use -R srfi.160.u8. Making this more confusing is the special form for "srfi" eggs, where the module (srfi nnn) has the symbolic name srfi-nnn (and not srfi.nnn). So you've got to remember -R srfi-nnn for some modules and -R srfi.nnn.foo for others.

Please simplify this mess and allow us to use the list names.

[sjamaan]

Implemented with ca1a42ae