Add zh-Hans first.

Localized some files. To be continued...
Merge remote-tracking branch 'upstream/develop' into develop
Fix font overlap
Fix autolayout warning for zh-Hans
Localized printpanel
Update OgreKit version
Update localization for some xib files
Finish XIB files
Fix autolayout
Localized strings and fix some translation in xibs
Fix word to be apt
Update rtf files
Update gitignore file

Add ignore files for OSX system. (.DS_Store)
Merge branch 'develop' of https://github.com/coteditor/CotEditor into develop
Disable rich text panel in zh-Hans
Fix go button in zh-Hans
Add "show invisibles" option for zh-Hans
Merge pull request #305 from onevcat/develop

Add Chinese localization for CotEditor