CGOOptimizeToVBONotIndexed and CGOOptimizeToVBOIndexed will
automatically call CGOCombineBeginEnd if the input CGO has Begin/End
operations. They will also set `use_shader` on the CGO.
Fixes `set cgo_debug; wizard demo, raster3d`
Eliminate various CGOFree calls by using unique_ptr.
* stick_round_nub for COLLADA export
* UTF-8 in feedback
* display_scale_factor (ported from Incentive PyMOL)
* dx map import: support "type float" and skewed delta
* fast PDBx/mmCIF and core CIF loading in C++
* new connect_mode=4 does bonding with components.cif dictionary
(mmCIF only, components.cif needs to be present in current
directory)
* gray out residues in the sequence viewer that are missing from the
current state; Read missing residues from mmCIF files
(_pdbx_unobs_or_zero_occ_residues records) so that they show up in
the sequence viewer
* add spider map reading support
* load "map" as ccp4 instead of throwing "ambiguous" error
* xyz write support
* Improve right-button zoom: use origin instead of clipping slab
center as depth indicator, fixes zoom speed when far clipping plane
is very far away
* don't use dynamic_width for nonbonded rep
