Changelog:

r1064 added io ctl cmd 0x01010005 (umd file seek set, issue 88)
r1063 Fixed interpretation of Z for 2D Vertex, tested with 2DStudio.
r1062 sceIoPollAsync() should yield in all cases to allow the async IO to complete (completes only on thread switch).
r1061 Fixed "ArrayIndexOutOfBoundsException: Sector number 126031 out of bounds." (Issue 74).
r1060 -Implemented VUC2I, VC2I, VUS2I, VS2I - Fixed VH2F - Fixed disasm of VFPU Instructions currently implemented