Add language selector to the docs&primary-nav

Add language selector,and change twitter to weibo because we cann’t
visit twitter at china :(
This file should be in the last commit
Remove console.log in view function

There was a console.log in view function to show the
req.session.currentLanguage for debug,not need it anymore.
add ca to ssl config
add ca to ssl config
add ca to ssl config
Merge pull request #788 from snowkeeper/sslCA

Add CA option to SSL configuration
Fixes #787 (error thrown without user list registered)
sync with upstream
Add `static options` option - closes #763
Merge pull request #798 from sebmck/static-options

Add `static options` option
Updating changelog
v0.2.37
fix space missing.
Merge pull request #799 from weekwood/master

fix space missing.
change '资产' -> '资源'
fix static asset - > '静态资源'

Reference:
asset pipeline in rails http://guides.ruby-china.org/asset_pipeline.html
asset catalog in iOS http://mued.sohu.com/2013/06/ios-7-ui-transition-guide/
Merge branch 'master' of github.com:weekwood/keystone
Fixing broken location filters
Fixing broken boolean filters
Updating changelog