The path option specifies additional module and import directories
searched by the Spyce engine. Specifically, the Spyce path (the path searched
to resolve [[.import]] directives) is the Spyce
home modules directory, plus the directories specified here, plus the
directory of the current Spyce file. The directories specified here are also
added to the sys.path, so that import statements search these directories as
well. The format for this option is a colon-separated (or semicolon-separated,
depending on your operating system) list of directories. If path is omitted
from the configuration file, the engine will check for a SPYCE_PATH variable in the process environment, and use
that. Failing this, the default is an empty string.