Add guides from Andor's translation.
Fix title, prologue, kill anchors.
Note blocks.
WARNING blocks.
TIP blocks.
Finish i18n md conversion.
Finish action mailer basics conversion
Finish testing guides conversion.
Finish debugging rails application conversion.
Finish configuring guide conversion.
Finish command line conversion
Finish conversion of caching with rails.
Finish asset pipeline conversion.
Finish working with js conversion
Finish rack conversion.
Finish security conversion.
Normalize wording.