some minor tweaks, syncing with hscPipe 3.1.2
Merge branch 'master' into psfex_hacking
use PTR(HscSpatialModelBase) in polypix constructor, rather than integer spatialOrder
Merge branch 'master' into psfex_hacking
oops, replace one instance of size by psf_size
Merge branch 'master' into psfex_hacking
change behavior of PolypixPsf::_upsample() near edge
Merge branch 'master' into psfex_hacking
switch fakePsfexDeterminer to flagKey
use flagKey instead of candidate status, in comp2PsfDeterminer and polypixPsfDeterminer
Merge branch 'master' into psfex_hacking