Add shrinkPath to write shorter path names.
* morituri/test/test_common_common.py (added):
Add test.
* morituri/program/cdparanoia.py:
Catch ENAMETOOLONG and shrink path.
* morituri/common/program.py:
Update track result's filename if it was shrunk.
* morituri/rip/cd.py:
set the possibly shrunk path on the result.