Add lastupdate attirbute and function as defined in delicious.py
Changed lastupdate attribute and method names to include an underscore
to fit PEP 8 style guidelines.
Removed duplicate last_update debug output line
Merge pull request #7 from rmacduff/master

Add lastupdate attirbute and function as defined in delicious.py
Update docs - document token auth
Merge pull request #9 from FiloSottile/patch-1

Update docs - document token auth