Handle relative paths better
So if you you use cpobj -r . mirror:
currently you will get keys with leading .'s in front which is awkward. Should we strip the leading .'s? what about ..'s and what about ./../.?
$ lsobj mirror
-rwx--- 06/10/2014 13:23:43 0.0 b ./
-rwx--- 06/10/2014 13:23:58 0.0 b ./OpenBLAS/
-rwx--- 06/10/2014 13:23:59 3.1 MB ./OpenBLAS/OpenBLAS-0.2.6.tar.gz
-rwx--- 06/10/2014 13:24:30 0.0 b ./Python/
-rwx--- 06/10/2014 13:24:33 12.6 MB ./Python/Python-2.6.5.tgz
-rwx--- 06/10/2014 13:24:45 13.4 MB ./Python/Python-2.7.1.tgz
-rwx--- 06/10/2014 13:24:32 13.4 MB ./Python/Python-2.7.2.tgz
-rwx--- 06/10/2014 13:24:40 13.5 MB ./Python/Python-2.7.3.tgz