Remove unused include file

Remove 'TRegexp.h' include, only 'TPRegexp' is used.
Use PCRE for matching patterns to wave/amplitude names

Use PERL compatible regular expressions to match wave or production
amplitude names to patterns when getting the corresponding indices to
e.g. calculate total intensities/intensities for more than one wave.
The usage of 'TRegexp' is replaced by 'TPRegexp'. Obviously PCRE are
much more powerful than the version of regular expression used before,
patterns compatible with the old version should work just as before.