Add missing parameter separator in URL for mset().
add __getitem__ to CObject to support slice operator
added CObject.__nonzero__ for nonempty=truthy
Fix URL separator issue
Fixes to proxy handling with config load/save and xnatPass login
Merge pull request #40 from SyamGadde/master

attrs.mset() bug
Merge pull request #44 from karchie/master

add __getitem__ to CObject to support slice operator
Merge pull request #45 from pyxnat/win-url-sep-fix

Fix URL separator issue
Merge pull request #47 from dommcintyre/fix-proxy-config

Fixes to proxy handling with config load/save and xnatPass login
Merge commit 'aa21b6c3f278658300ea732c6acc4d4ffb6e9165'