implement instance selection and regex matching

the instance name can be given now, too, the available paths are
searched by the PDH framework (supports * wildcards), additionally
inclusions&exclusions of complete paths can be specified by regular
expressions using the simple deelx.h library, and these regex will also
match on the English names if requested (default yes)
fix NULL pointer access

some counters do not have an explanatory text, the field will be NULL,
so use the counter name instead
configuration options for graph info and vlabel
move code into the appropriate branch
fix logging and counter names with parantheses
print message about test mode exit
Merge pull request #1 from seidler2547/master

test