Review action view overview.md
Translating action view overview.md
Update guide version.

4.1.4, 4.0.8, 3.2.19
Ooops, forget to update href.
Fix sample code error in validation.md.
Sync engines.md
Update 42 release notes
Update active support
Update generators md
Update maintenance policy (zh_tw).
Refine a word in 42 release note.
Fix link in prologue in 4.2 release notes.
Better changelog linking.
Fix link error :sweat:.
Sync!
Sync command line
Sync getting started
sync i18n
Sync many guides.
Translate debugging rails app.

closes #35.