Upgrade api to 0.0.6. Fixed #8. Fixed #7. Fixed #6. Fixed #5.

This plugin was based on ZAP 2.1 which was released in Dec 2012. ZAP api
has changed significantly. Both zap and zap's python api are not compatible
with the older client. Furthermore, in order to perform basic form-authentication,
only python-owasp-zap-v2==0.0.6 will work. Older releases will raise 'not implementor'
error.

A quick build I did tonight can be found here: https://dl.dropboxusercontent.com/u/14655573/mozilla/zap-2013-07-16-yeukhon.tar
Bump plugin version.
Merge pull request #9 from yeukhon/master

Upgrade api to 0.0.6. Fixed #8. Fixed #7. Fixed #6. Fixed #5.