Add contrib/load-fricas.lisp.
Disable graphics when viewman is missing.
Fix issue 292.
Add support for 'nopile' syntax.
Use double-float version of pi.
Avoid name conflict with Debian clisp.
Deactivate use of IBM codepage in HyperDoc pages.
Speed up lookup in environment.
Speed up mkCategory.
Silence clisp loading messages.