Merge pull request #330 from greg0ire/documentation_improvements

Documentation improvements
fix day value in seconds, used new constant variables
use the Admin.shared_setup function
put error translations in the validators catalog

Symfony searches for validator translations in this particular catalog,
if you put them in your main catalog, error messages won't get
translated.
whitespace
Merge pull request #334 from greg0ire/translation_problem

Translation problem
remove doctypes

Symfony doesn't like them and gives me a 500
Merge pull request #335 from greg0ire/translation_problem

remove doctypes
fix typo in test class name
fix grammar and syntax