* 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
* fix assemblies for cases like 4f3r which have multiple entries in the _pdbx_struct_assembly_gen table
* fix ref counts in iterate/alter subscripts
* improve side_chain_helper and nucleic_adic_mode situation
* eliminate all "try/catch" blocks for std::map lookups
* clean up some MemoryDebug stuff and remove unused jenarix wrapper
- scenes: Restore the old behavior that when recalling a scene, all objects
which were not present when storing the scene are disabled.
- fix auto-complete for filenames with spaces
- fix an object menu panel group ordering problem
Refactoring:
- remove unused variables (Partly applies https://sourceforge.net/p/pymol/bugs/166/)
- lots of: char* -> const char*
- remove inline Parse functions, simplify ParseFloat3List
- make functions static
