add changelog for #4932 [ci skip]
Update Rails to 3.2.18

This Rails release closes a security issue but we're not affected by it.
See CVE-2014-0130 for further details.
Add account_deleter.rb to load_libraries initializer
Merge pull request #4953 from oliverbarnes/4792-quick-fix-user-deletion

Add account_deleter.rb to load_libraries initializer - Fix #4792
Home page, registration page and robots.txt personnalization
Add my aspects link in the header