Add liberal and conservative traits w/ generic placeholder trait icon
Initial version of demesne law codegen complete

EMF now definitely doesn't inherit PB demesne laws anymore.  The design
of these laws is, of course, subject to change. I'd like to find a
reasonable way to make demesne focus spread over more range than up
to 1 obligations increment w/o significantly increasing the possible
range of levy values.
Split defines/static_modifiers for SWMH, added -1 levies base_values
Fixed logic error for mid-level demesne slider allow triggers
Startup hook calls dynlevy init event