Correctly parse user.user_birthdate from DB
Add user birthdate to Special:LookupUser
Add i18n messages for Special:LookupUser
Use $wgLang->date() instead of $wgLang->timeanddate()
Remove some hacky code
Add i18n message for unprovided birthdate
fix typo in i18n message name
final fix as requested by gruns
Fix whitespace
Merge pull request #2143 from WikiaVolDev/VOLDEV-33

VOLDEV-33: Add full birthdate to Special:LookupUser