* [FLAG_EXT,NEW] Relocated temporarily_set_flag/3 from META_EXT.
* [LATEX,SC] New module relocating the DCG rules from LATEX_EXT.
* [LATEX_EXT,SC] Overall cleanup.
* [LATEX_EXT,SC] Extracted advanced process creation as a generic predicate.
* [MATH_EXT,EXT] betwixt/3 now takes `minf` and `inf` for the boundary arguments (besides VAR).
* [RUN_EXT,NEW] Added create_process/[3,4] for advanced process creation (used in Notes, IOTW).
* [SETTING_EXT,NEW] New module with setting extensions. Currently contains temporarily_set_setting/3.