Link to CoffeeScript official website
Add categories description and Car example.
Add description and example of how to simulate protected methods.
Add extensions description with example.
Add much more to the protocols section.
Add much more to the protocols section.
Merge branch 'objective-c-protocols' of github.com:levibostian/learnxinyminutes-docs into objective-c-protocols
Updated russian julia
Added lang to objc fr
No objc highlighting, use cpp to fix errors
Merge pull request #486 from levibostian/objective-c-protocols

Objective-C protocols, categories, and extensions
Merge pull request #505 from roryokane/patch-1

Link to CoffeeScript official website
juliavonovich
Merge branch 'master' of github.com:adambard/learnxinyminutes-docs
Updated learngo filenames
Updated a lot of filenames
Issue#163

https://github.com/adambard/learnxinyminutes-docs/issues/163
Merge pull request #507 from Jakehp/patch-1

Issue #163 fix
[go/es] Update translation, format comments.
[go/en] Fix veriadic function bug; format and clarify comments.