As a consequence of rev. 76cd8d2558,
imported modules were unable to access their resource files during
import.
Rather than further modifying the file_open API to whitelist paths
(the whole thing needs a redesign in master), we temporarily
whitelist the temporary directory by including it in the global
addons_paths, making sure to undo it afterwards.
This gives all lower level function access the resource files via
file_open, without having to pass around whitelisted paths
through many different calls.
Olivier Dony
c6b9b69f6a