Added new utility modules log and command.

Refactored install and main code to use the new modules
Added new utility module config to allow some user configuration.

Configuration files (named fb-get.conf) are documented in src/util-config.bas and would
be located in the exepath directory on windows and
/usr/local/etc/freebasic on *nix. The config file is entirely
optional and if not present the defaults will be used.