Downgrade origin of the 9 Chapter to Rails 3.2
Replace URI with URL across the origin of the 9 Chapter
Upgrade origin of the 9 Chapter to Rails 4.0
Done with 9 Chapter translation (Rails 4.0)
Remove useless file
Translate contents of the 9 Chapter (Rails 4.0)
Move 9 Chapter _fragments into appropriate '4_0' folders