Added support for trailing Z in UTC time
Fixed error message, added tests for trailing Z
Added exception test for non-utc
Merge pull request #2211 from Epitrochoid/add-support-trail-Z

Added support for trailing Z in UTC time
Add changelog entry for #2211

[ci skip]
Merge pull request #1628 from mhvk/units-dex-dB

Add dex, dB units
Forgotten CHANGES.rst entry for #1628
Merge pull request #2231 from mhvk/units-dex-dB-CHANGES

Forgotten CHANGES.rst entry for #1628
Introduce functional units (not subclassed from unitbase) and quantities
Add hash
Cleanup following rebase to faster quantity initialisation; docs/comments