translate table headers
Merge pull request #22 from sdpfoue/master

翻译heroku.md，认领pages.md，按最新的翻译要求修改了一下posts.md。
translate missing title
add spaces between English words and Chinese characters
Merge pull request #25 from yizeng/format-spaces

add spaces between English words and Chinese characters
Merge pull request #24 from yizeng/translate-table-headers

Translate table headers