[dw-free] Convert site skin & theme preview images to color-indexed PNGs

[fu]

[commit: http://hg.dwscoalition.org/dw-free/rev/8d524125bd51]

http://bugs.dwscoalition.org/show_bug.cgi?id=4054

Site skin previews: free

Patch by ninetydegrees.

Files modified:

• htdocs/img/siteskins/previews/celerity.png
• htdocs/img/siteskins/previews/gradation-horizontal.png
• htdocs/img/siteskins/previews/gradation-vertical.png
• htdocs/img/siteskins/previews/lynx.png

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diff -r b06a6502feca -r 8d524125bd51 htdocs/img/siteskins/previews/celerity.png
Binary file htdocs/img/siteskins/previews/celerity.png has changed
diff -r b06a6502feca -r 8d524125bd51 htdocs/img/siteskins/previews/gradation-horizontal.png
Binary file htdocs/img/siteskins/previews/gradation-horizontal.png has changed
diff -r b06a6502feca -r 8d524125bd51 htdocs/img/siteskins/previews/gradation-vertical.png
Binary file htdocs/img/siteskins/previews/gradation-vertical.png has changed
diff -r b06a6502feca -r 8d524125bd51 htdocs/img/siteskins/previews/lynx.png
Binary file htdocs/img/siteskins/previews/lynx.png has changed
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