Updated release notes (v2.3.3)
Merge branch 'release/2.3.3' into release/2.4.0+
Updated release notes (v2.4.0)
Merge branch 'release/2.4.0' into release/2.4.0+
(Merged NEWS from 2.3.3 and 2.4.0)

Conflicts:
	NEWS.md
Updated NEWS (v2.4.0) with pull requests