High Priority
--------------
  *  Find appropriate offset for min 3-point
     gaussian interpolation
  *  Verify output from --write-map
     with FFT algorithms
  *  Add support for AVI movie files
  *  Make sure that output file is
     left is valid state if interupted

Lesser Priority
--------------
  *  Should calculate signal-to-noise
     ratio for post-processing algorithms
  *  Finish re-work of osiv_draw
  *  Finish OSIV user's manual
  *  Improve saving correlation maps
     for iterative and MQD algorithms
  *  Make algorithms multi-threaded

Internal Changes
-----------------
  *  simplify argument checking
      (find way for osivx_grid to do more work)
  *  write frame algorithm template
  *  write seqen algorithm template
  *  add osivx_imq?_t that is
     a signed integer that has the same
     size of osivx_immp_t
  *  move algorithms 2 & 4 to generic system

