got following task:
    1. everything view can set its class in xcode
    2. checkout list can show something now.
Merge branch 'dev' of https://github.com/us4us/seed into dev
Using adapter mysql2 to replace mysql in database.yml to fix Chinese
charactor show errors.

ref: http://stackoverflow.com/questions/7882841/why-does-activerecord-return-fields-encoded-as-ascii-8bit-even-with-mysql2-gem?rq=1