Add CLD2 of May 2014

Repository Root: http://cld2.googlecode.com/svn
Repository UUID: b252ecd4-b096-bf77-eb8e-91563289f87e
Revision: 161
Use CLD2

- Use ExtDetectLanguageSummary
- Build shared object
- Update tests:
  - Chinese (Traditional) is now "zh-Hant"
  - "Unknown" is no longer "reliable", see
    https://code.google.com/p/cld2/issues/detail?id=1