Improved release automation documentation
Improved release automation documentation

I plan to improve the release automation so that it's easier to troubleshoot. For now, added more docs.

Driven by problem described at #915

mockito/mockito,ze-pequeno/mockito,ze-pequeno/mockito,mockito/mockito,terebesirobert/mockito,mockito/mockito,bric3/mockito,bric3/mockito,bric3/mockito