ThemeRoller: Icon colors are slightly off

[scottgonzalez]

When creating a theme, I picked color #009ee0, but generated result of an icon is #049ee4.

http://bugs.jqueryui.com/ticket/8446

[rxaviers]

This is a legacy images manipulation error. Marking this issue to be addressed in the new image manipulation rewrite.

[rxaviers]

Fixed by 475fc48, see #77