Fix a bug in resource_isdir(), introduced in 0.4a2.  Add str/repr of Distribution objects.
Fix a bug in resource_isdir(), introduced in 0.4a2.  Add str/repr of
Distribution objects.

--HG--
branch : setuptools
extra : convert_revision : svn%3A6015fed2-1504-0410-9fe1-9d1591cc4771/sandbox/trunk/setuptools%4041055

pypa/setuptools,pypa/setuptools,pypa/setuptools