Delimiter is limited

[Quimoniz]

Presently the delimiter that can be specified for parsing files is severely limited, due to ";" and "," being interpreted as variable specification syntax. Therefore it should be implemented to allow specification of Hex Code values for the delimiter e.g. "0x41" denoting the delimiter "A".

[Quimoniz]

since there is setting METRIC_SEPARATOR provided by SCOREP, which enables one to specify a different separator than "," we don't need to worry about escaping ",", but rather we have to allow for all the delimiters we are using to be escaped e.g. with a backspace. E.g.: "+", ";","="