Revision 1032

* dynamic bvop decision stats bug fixed
* added runtime debug level option. this only only activated when _DEBUG is defined.
  level is specified globaly, via "xvid_glb_init_t.debug" and XVID_DEBUG_xxx defines.
  references to previous DPRINTF_LEVEL_xxx's have been replaced throughout libxvidcore
* futher bitrate zone fixes for plugin_2pass2.c
* removed old ratecontrol.c from msvc project
* xvid_encraw.c specifc:
  * added "-max_key_interval integer" option
  * renamed -debug to -vop_debug
  * added "-debug integer" option, which sets xvid_gbl_init_t.debug field
  * s/length/len/ status line
* vfw specific:
  * zone/bitrate typos fixed ("you eediot")
  * renamed "debug" regkey to "vop_debug"
  * added "debug" regeky and textbox which sets xvid_gbl_init_t.debug field