pattern_sim: Fix handling of centric reflections
Update manual
Tidy up a bit
ambigator: Don't read peak lists

This fixes a segfault, because the peak list cannot be read without the geometry.
Fix flag type
Update ChangeLog
partial_sim: Initialise image.event to NULL
Formatting
process_hkl: Fix condition for histogramming
Formatting
Fussiness
Use H5Lexists() instead of H5Gget_objinfo()

This fixes some HDF5 console splurge when saving an image
Calculate CC for each frame. Reject bad frames (--min-cc). Output stats (--stat=)

But these should be in partialator?
Added scripts/plot-cc-and-scale.R to show how to plot
frame-wise statistics from process_hkl.
Fixed option name 'min_cc' to 'min-cc'
Fixed message from check_hkl.c
Tidy up scaling/CCs a bit
Fix variable name in plot-cc-and-scale.R
Plot histogram of CC.

Conflicts:
	scripts/plot-cc-and-scale.R
Introduce CrystFEL unit cell files
Remove cell_{get,set}_pointgroup() from API