Trans Init tmp.
sync action_view_overview and partly translation
Remove getting started code.
Translate init.md (wip)
Translating init.md (wip...)
Finish translation of initialisation.md.

closes #38.
Merge branch 'init'
Remove the from init.md (zh-TW).
Refine a sentence.
Update caching with rails (zh-TW).
Update active support instrumentation (zh-TW).
Update asset pipeline.md
Update action controller overview.md.
More post-install message.
Sync 4.2 Release Notes.
Merge pull request #65 from taiansu/action_view_overview

sync action_view_overview and partly translation