Log Message:
Update bastet from 0.41 to 0.43.1

pkgsrc changes:
 - Switch to GitHub framework
 - Update HOMEPAGE
 - Set LICENSE (GPLv3)
 - Upstream switched from C to C++
 - Require boost-libs and boost-headers
 - SETGIDGAME -> USE_GAMESGROUP
 - Need to fix VARBASE differently (now with SUBST framework)
 - Drop unneded patches
 - Enforce any curses library (with a patch)

upstream changelog
==================
==0.43.1==
Small fixes: appdata and desktop file, moved to an unordered_set header that
should work on most compilers. Should still port to autotools or something
similar sometimes in the future.

==0.43==
Complete code rewrite. As I go on trying to grok C++, algorithms and data
structures, and as I started to understand more of Peter's code, I found
it useful to rewrite all this stuff from scratch.
This should solve some issues and probably introduce new ones. Therefore this
version needs a lot of playtesting and bug-hunting.
The algorithm has been split into two, one with the next block preview (normal)
and one without (harder).
New and more sophisticated techniques are now used to write the  block-choosing
algorithms, which should not be fooled as easily as before.