Neos bugfix releases: 4.3.15, 5.0.13, 5.1.9, 5.2.2

[aberl (Alexander Berl)]

We tagged a couple of bugfix releases for Neos. They fix bugs and inconveniences, as is to be expected.

See the changelogs for details:

• Neos - 4.3.15 ChangeLog
• Neos - 5.0.13 ChangeLog
• Neos - 5.1.9 ChangeLog
• Neos - 5.2.2 ChangeLog

Thanks to those who contributed!