Add python3 support

Fix issues found adding python3 support
Fix the setup.py to properly install the plugins
Add unit tests
Remove django dependency as it's no longer used for the plugins

Add expand unit test
Add command line option to get a list of installed plugins

Merge README.txt and README.md
Add command line option to get a list of installed plugins

Merge README.txt and README.md
More python3 fixes

Make the dns plugin work under python3 (dependency name is different between python2 and python3.)
Add .idea to the gitignore
Again remove that directory
Update the version
Merge pull request #5 from yahoo/python3

Add Python3 support