Support ARB_indirect_parameters properly. Bump GL serialise version
Fix using wrong pointer as 'window' handle for frame capturer
Support ARB_map_buffer_alignment on 64byte boundaries

* The real implementation can do more if it wants, and align to a larger
  alignment, but we just return 64 to the program and align to that, which
  satisfies the extension minimum requirements (and chances are no program
  takes advantage of wider alignment anyway).