Beta 06

Still busy with work, so this took a long time. But along with a few bug fixes, I've included new features!

• Markets' demands for specific products now decrease with every sale, so trade lanes can dry up.
• Ships in your fleet can now be ordered to gather around 1 of 3 rally points in combat (useful for missile boats, etc.)
• And you can now directly attack sectors and claim them when successful, as a balancing of that, empires are now more stubborn regarding outright surrender.
• Two new weapon technologies!
• And improvements to enemy ship AI.