Update ruby-cssmin pacakge to 1.0.2.

CSSMin History
================================================================================

Version 1.0.2 (2008-08-23)
  * Fixed a bug that could have resulted in a necessary space being removed if
    it preceded a compressible color value, such as in the property
    "border:1px solid #cccccc".

Version 1.0.1 (2008-07-25)
  * Fixed a rare bug that could result in redundant semicolons.

(taca)