Methods `parse` and `parseFile` from `Toml` class accept a new argument `resultAsObject` to return the parsed input as an object (an instance of `stdClass`)

The method `parse` from `Toml` class only can be applied to TOML strings. In case of parsing a TOML filename use the new method `parseFile`

The exceptions have been refactored, so the classes `ExceptionInterface`, `LexerException` and `RuntimeException` have been removed