Update to the 1.01.20160208 snapshot.

• Removed STEPSIZE option since it's now part of the code (which also makes the patches obsolete).
• The upstream code is now hosted on GitHub, so use USE_GITHUB=yes.
• The upstream code now has a proper buildsystem, which allows us to simplify the code quite significantly.

PR: 207229
Submitted by: Ralf van der Enden <tremere@cainites.net>
Approved by: maintainer timeout (20 days)