add Collection.md
translate _.each
translate _.map
translate _.reduce
fix
remove original sentence
translate _.reduceRight
translate find
Merge pull request #10 from tokuda109/objects

監訳文章に修正した。
translate _.filter
translate _.where
add link for original
translate _.reject
translate _.every
translate _.some
update
insert space
Merge pull request #12 from 1000ch/master

update
fix some
add link to original