Compress png files with PNGOut /r.
Update lcms2 to 45034fb
Updated Greek translation.

Refs: #1680.
Move old changelog entries to Changelog_old.txt.
Updated Basque translation (ticket #2890).
Add VS2012 update 3 version number.
Remove the VS2012 update 2 workaround now that update 3 is out.

This reverts da78edb, 8d50410 and 0d6bec3