Make 2.5.2 release

[kghbln]

Tracking issue for the 2.5.2 release.

• Release notes
• Changes since 2.5.1

• Finalize RELEASE NOTES also by clearing the "releasenotes" label
• Update README.md
• Update INSTALL.md
• Update "composer.json" (remove SMW 3.0 dev)
• Update version number SemanticResultFormats.php (version 2.5.2)
• Create tag
• Announce via mail
• Do a release tweet on Twitter
• Provide RELEASE NOTES to master
• Run composer update on smw.o

[krabina]

please wait a little, there will be more enhancements for the filtered format by @s7eph4n
or release it as 2.5.2 and plan a 2.5.3 release

[kghbln]

I synced the approximate release date with the one of SMW 2.5.4 so no worries. We are pretty flexible here so a week earlier or later should not be a big issue.

[mwjames]

FYI, Just hitting the link=none issue for the tree format in [0].

[0] https://www.semantic-mediawiki.org/wiki/Template:User_manual/List

[kghbln]

FYI, Just hitting the link=none issue for the tree format in [0].

@s7eph4n Any objections in doing the release next week to move in the fix. Doing another release to get more of the new features out is no issue.

[s7eph4n]

I'd say go ahead. I'm debugging some really strange behavior on the filtered format right now, but as you say we can release a new version anytime.

[kghbln]

I'd say go ahead.

Thanks for the feedback. Will do!