Fix CPAN bug #51993, handle YTD values

Fix bug #51993 from CPAN with patch from holbrook@cpan.org.

Handle YTD values in reports JR1, JR1a. Those were missing in
the report object.

Added Log4Perl for easier debugging.
Support COUNTER Release 3 reports JR1, JR1a

Add support for COUNTER Release 3 reports JR1, JR1a (CSV only). Still missing is
support for other COUNTER R3 reports and for report files in XML format.
Set to version 0.12.
Autogenerate README with ExtUtils::MakeMaker

make dist will generate a new README and README.pod
Add dependency Log::Log4perl
Update META.yml
Update Makefile.PL
Update MANIFEST and MANIFEST.SKIP
Add a .gitignore file