[Doc] Update release notes.
[Mod] Update OpenMPT release generator.
[Fix] Correctly show ampersands in template/example song filenames.
[Mod] OpenMPT: Version is now 1.28.01.00
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git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.28@11100 56274372-70c3-4bfc-bfc3-4c3a0b034d27