tiny_nios2_051210 [nios2]

06/03 fixed "trap" instruction handler [return at ea] (ex.S)
06/03 added "unhandled trap at 0xXXXXXXXX" warning message (sc.c)
05/xx cpio archive support (old portable (ASCII) archive format)
      (memory mapped only) (fs/cpio_mm.c)
05/xx printf preliminary single precision support (lib/std/vsprintf.c)
05/xx basic and preliminary math routines support (lib/math/math.c)
      (pow, factorial, sin, cos, deg/rad conversion)
05/xx added sprite blit with alpha value (gfx2d/sprite.c)
05/xx added 24bits RLE encoded TGA picture format support (gfx2d/tga.c)
05/xx simplified some gfx2d routines