Bump VERSION to 1.6.26.

History.txt

-=== 1.6.26 / YYYY-MM-DD
+=== 1.6.26 / 2013-02-16
 
 * Mark all text strings retrieved from fox as UTF-8 when running on Ruby 1.9
 * Fix loading error on Ruby 1.8.7 by renaming the C++ extension to fox16_c

lib/fox16/version.rb

 module Fox
   def Fox.fxrubyversion
-    "1.6.26.pre1"
+    "1.6.26"
   end
 end