Prevent voices from entering tournament battles as a battler

~~Sets a variable inside battle rooms that should only be enabled when the
tournament script calls it. This variable prevents roomvoices from joining
the same way they are prevented in rated battles.~~

To mark battles as tournament battles, refactored battle room constructors 
to accept more generalized details. Said details currently process whether 
the battle is rated and whether it is a tournament, but can be expanded to 
check for more parameters.
No, which is why we can use it for our own purposes to denote what kind of string it is. PS uses `"` for strings that are unescaped and will be shown to humans, `'` for all other strings.