translate _.contains
translate _.invoke
translate _.pluck
translate _.max
translate _.min
translate _.sortBy
translate _.groupBy
translated Function.md
Merge pull request #15 from hoisjp/pull_request_function

監訳希望 Function.md
Update README.md
Update README.md
translate _.countBy
translate _.shuffle
translate _.toArray
translate _.size
fix some Japanese
Merge pull request #16 from Layzie/collection

Translated Collection
Update README.md
reflected the feedback, and deleted original.
fixed the feedback