[PD-dev] removing path and libs from Pd-extended preferences GUI

[Hans-Christoph Steiner]

I am thinking for the next release of Pd-extended, that the preferences
panels for loading libs and adding paths should be removed.  [import]
and [declare] cover all it can do in a better way, and people who really
want to have libs and paths loaded globally on start-up can use either a
manually written preferences file or the command line flags.

I could see maybe keeping the paths GUI, but I don't see any good
reasons to keep the startup libs GUI.  Anyone have objections?

.hc