Log Message:
Update to 0.2.3.0

Changes from 
0.2.3.0
 - Updates for base-4.7.0 (GHC 7.8)
0.2.2.2
 - Removed references to base-unicode-symbols
 - Merge branch 'without-unicode-symbol-package' of \ 
git://github.com/minamiyama1994/lifted-base
 - Support transformers-0.4.0.0
0.2.2.1
 - Use Build-type: Simple
 - Fixed build on Mac OS X