Language edit system updated

All variables are used both in Javascript and PHP
[FIX] 'Everywhere' room enabled

Enable the ‘Everywhere’ room
Minor graphic updates
Root Question added

Added the new RootQuestion column in Questions table to mark an edited
question as an updated question and not as new question
Questions Object Oriented

New question’s manager implemented: now for every question’s type there
is a PHP class (and Javascript dedicated functions) that allows
developer to implement new question’s type faster