Add -V or --version command to rapuma cmd-line UI
Fix bug with creating new TeX hyphenation file

The grpHyphExcTexFile variable moved from self to self.local some time
ago, but a couple lines in manager/xetex.py didn't get changed. Fixed.
Fix bug where running "scripts/rapuma" didn't work

Running "./scripts/rapuma" would work, but not "scripts/rapuma", because
there was an abspath() call missing. There are other ways to tackle the
problem, but this is the simplest.