path re-imagined

This is not necessarily complete, but I belive a good step in the right
direction.

Should fix issue #61
Fixes for tests on windows environment

Handle the special case of CD'ing to "/" on windows (should replace that
with current drive "C:\"
fixing an issue where cd'ing up a dir from the root would not leave you at the root
remove not-needed debuggerdisplay attribute
Merge pull request #63 from Pash-Project/path

Path fixes