DOCS: updated to match additions from 0.3.0 branch.
DOCS: updated to match additions from 0.3.0 branch.

* Added docstrings in function syntax.
* NULL type ID note added.
* Added Function pointers alias and dereferencing descriptions.
* Added parametrized macros description.
* Added #verbose directive description.

vehar/red,rheber/red,iArnold/red,red-eco/red,red-eco/red,NikolayShubenkovProgSchool/red,NikolayShubenkovProgSchool/red,rheber/red,iArnold/red,vehar/red