Adjusted tests for CHtml::refresh() regarding to fix for issue #2239
doc fix
Added "Symlinking assets" section to Guide's "Performance Tuning"
[NL] Update for latest code revision
Merge pull request #2262 from Blizzke/master

[NL] Updated
Added link to wikipedia article about what symlink is
Merge pull request #2260 from samdark/add-symlinking-assets-to-performange-guide

Added "Symlinking assets" section to Guide's "Performance Tuning"
Enh #1447: CSqliteSchema: added enabling/disabling integrity check for sqlite. PR #1449.
Failing test fix.
Fixes #2258. CJuiSliderInput didn't support string typed 'range' option.
Kazakh (kk_KZ) messages updated.
Russian (ru_RU) messages updated.