Add IO::All to prerequisites
Fix typo
Update API documentation version
added https information RexOps/Rex#383
Add pod release notes converted from GitHub wiki
Update release notes
Add markdown release notes converted from GitHub wiki
Update release notes
Add links to release notes
Merge remote-tracking branch 'upstream/master' into chinese

Conflicts:
	html/news.txt
	html/templates/api/index.html.ep
Merge remote-tracking branch 'upstream/master' into chinese
added 0.51.2 release notes
merged release-notes branch
added missing release notes
Merge remote-tracking branch 'upstream/master' into chinese

Conflicts:
	html/news.txt