add Chinese translation for basics2.textile and collections.textile
finish the translation, need to be refined.
fix 3 chinese translations and replace the code tag
fix zh_cn/type-basics.textile zh_cn/advanced-types.textile  and
zh_cn/coll2.textile; fix a error
url in coll2.textile
finish concurrency and java
finish finagle.textile
finish the searchbird's translation
fix several mistakes
fix the typo
fix my extra modification
fix translation as suggested.
Merge pull request #105 from jasonqu/master

add Chinese translation and fix several typos