* x86: add support for real mode execution
  * x86: add full support for segmentation/paging
  * add baremetal-x86 system for bios firmware analysis
  * merge new arch.io module to define IOs' stubs
  * merge cas.blobs module
  * add fast versions of rep stos/lods/scas/movs
  * add tracepoint method in emul class
  * add support for PE resources
  * improve amoco app load/emul commands
  * add set,display,nexti,until in emul ui.