Blender Git Loki

Port wmWidget struct to lower-level C++ class

Main changes here are moving wmWidget to windowmanager/widgets/wm_widget.h, making it a class with private members, and adding/adjusting needed _get/_set API calls. To avoid lots of noise in code, D1697 is applied.
And of course there is some cleanup too.

Use inheritance for widgets

And of course minor cleanup

Refactor widget library

* Rename folder 3d_widgets/ to widget_library/
* Split up wm_generic_widgets.c into separate .cc files for each widget, move them into widget_library/
* Rename files containing geometry vectors from xxx_widget.c to geom_xxx_widget.cc
* Rename wm_widget_library.h to widget_geometry.h (contains the geom_xxx_widget.cc declarations)
* Add widget_library.h (contains widget library API declarations for external access)
* Move widget drawing function to wm_widget.cc
* Add/improve (doxygen) comments
* Remove wm_generic_widgets.c
* Usual cleanup

We have 22 files for widgets now :S Seems a lot, but maaaaaan things are so nicely structured now!

Fix incorrect file names in doxygen comments

Changed file extensions in rBbaca87c20cc22

Correction to previous correction

Forgot to use 'git add'. Sry for the noise.

Corrections to previous commit

Forgot to move wm_generic_widgets.c to the new place and to correct paths in doxygen comments

Move widget files to a proper place

Cleanup: Remove C version of widget-map, unneeded struct declarations

Cleanup: Move around enums & declarations, comments, ...

Remove wm_widgets.c!

Move widget-group keymap to wm_operators.c

Move wmWidget API to C++ file

Move Widget register functions to C++ file, remove unused function

Fix crashes when changing screen layout

Use C++ widget-map for widget operators, move them to wm_operators.c

Merge branch 'wiggly-widgets' into temp_widgets_c++_experiment

Conflicts:
source/blender/editors/object/object_edit.c

Merge branch 'master' into temp_widgets_c++_experiment

Cleanup: Move around functions

Merge branch 'master' into wiggly-widgets

Fix memory leak when looking through a selected camera.