added one half of the translated stuff
spelling fixes
Merge pull request #471 from levibostian/objective-c-memory-management

Objective-C memory management.
Add @autoreleasepool as alternative to NSAutoreleasePool object.
translated css to german
spelling, punctuation and more translation
Merge pull request #472 from kyrami/master

[css/de] translation to german
Move statements out of @interface that did not allow file to compile. Fix various typos/confusing wording.
Remove broken Apple website link to Learning Objective-C and replaced with Programming with Objective-C Apple book link.
[clojure/cn]Commit the clojure-cn doc.
Merge pull request #473 from jingege/master

[clojure/cn]Commit the clojure-cn doc.
Update go-cn.html.markdown
Merge pull request #474 from lidashuang/patch-1

Update go-cn.html.markdown
Update ruby-cn.html.markdown
Merge pull request #475 from lidashuang/patch-2

Update ruby-cn.html.markdown
Updated git-es to us lang:, not language:
Add input/output section for Racket
Fix Racket style
Improve language usage in Racket guide
Merge pull request #476 from cmpitg/master

[racket/en] Add input/output section for Racket