Add git push -u command to git tutorial.
Added swift docs
Formatted the document according to the guidelines
Merge pull request #636 from grant/master

Swift
Merge pull request #635 from levibostian/git-push-addition

Add git push -u command to git tutorial.
Translating coffeescript to pt-br
zh-cn translatation for Swift
Tiny symbol missing fixed.
Merge pull request #638 from xavieryao/master

[swift/zh-cn] zh-cn translation for swift
Tiny typo fix
Merge pull request #639 from ysagal/patch-1

Tiny typo fix
Merge pull request #637 from miguelarauj1o/trans_coffeescript

Translating coffeescript to pt-br
Merge remote-tracking branch 'upstream/master' into patch-1