update bundled Lua to version 5.2.2

5.2.2 is a bug-fix release; everything should still work the same way.
EQUATORIAL_RADIUS_TO_POLAR_RADIUS_RATIO - data/lang/Polski.txt
Merge pull request #2230 from johnbartholomew/lua-522

Update bundled Lua to version 5.2.2
Update Changelog.txt
Update Changelog.txt
Update Czech.txt

* 1 new token; SHA: 9b94c76
* typo; radius is not diameter!
* some linguistic/grammary changes, to better fit in Czech mouth
Merge remote-tracking branch 'radius75/Polski.txt'
update changelog