Added source directory for building XuLA2-LX25 ZPUino.
Increased offset into SPI flash because the Spartan-6 LX25 bitstream is larger.
Changed board identifier for XuLA2-LX9.
Updated bootloader VHDL file.
Merge pull request #7 from xesscorp/xula2-lx25

Xula2 lx25 from Dave. Still needs updating the boards list.