Fix detection of path conflicts.

 - os.path.commonprefix does not work as expected to return
   path component prefixes, but rather works on character
   by character basis.
added some more unit tests to test_abspath_overlap
Fix realpath_relation to consider os.sep and os.altsep.
Fix testcase and implement recent fix with new _is_parent_path function.
Merge pull request #24 from NikolausDemmel/fix-common-prefix

Fix detection of path conflicts.
0.1.4
Minor refactor tests: assertEqual instead of assertTrue, correct FakeConfig api usage
fix set command usage
documentation and minor optimization
fix svn diff output changed for svn 1.7.9
cmd info: adding entries to wstool info display for unmanaged paths
- Unmanaged paths are shown in a separate table, in a format that can
be copy-pasted for wstool set.
- Does not change the output using --only or --yaml
test getUnmanaged paths
Merge pull request #28 from vcstools/detect-unmanged-paths

Detect unmanged paths
remove lucid from the list for deb generation
unify stdeb2 / stdeb3 config files