- BUG FIX: extfield was badly screwed up. Fixed it. There is also
now a test-extfield.i test file, based on a sh6x6 with various extfield
test cases.
- BUG FIX: the display of the SHWFS spot pattern with the subapertures
and area of interest, field stop, was also bad. It should now work.
That's only when sim.debug>=1
- BUG FIX: Again, bug related to extfield and rayleigh fixed (_nx4fft)
- BUG FIX: a rare occurence bug could crash yao when command not defined
when resetting. Fixed.
- FEATURE: added flag wfs_disp_crop_edges, if set, enlarged edges due to
extfield and spotpitch combination won't be displayed, providing a more
natural look of the SHWFS spot image.
- FEATURE: Now by default, yao doesn't optimize the array size for FFTW
  in shwfs_init(). To restore this feature, set optimize_nx=1
- LLTlaserM2 was not implemented but did not give an error message when
used. Gotten rid of this structure member. Instead, use wfs.kernel.
- CHANGE: now displays the WFS pixels (in display) with bytscl, so
  e.g. tip-tilt on a quadcell will not appear so confusing/moving than
  before.
- ADDED the files:
  * flags.txt: description of all the feature-control flags that are not
    structure members
  * test0.par: same as test.par, but with extfield
  * test-shwfs.i: call shwfs_test() with correct parameters. Just call
    it with yorick -i test-shwfs.i in examples/
  * test-extfield.i: test battery of extfield, check validity of results.
    Just call it with yorick -i test-extfield.i in examples/
  * test-all_v*: old version results of running test-all.i, catching up.
- upgraded to version 5.4.0