Merge pull request #145 from piotras/master

Do not use property_view
Merge pull request #146 from piotras/master

Remove nodes in subgraph scope
Merge pull request #147 from piotras/master

Download explicitly named tarball
Merge pull request #148 from piotras/master

Fallback to ratatoskr
Merge pull request #149 from piotras/master

Do not throw exception if removed node doesn't exist
Merge pull request #152 from piotras/master

Minor updates
Merge pull request #153 from piotras/master

minor updates
Added prepareAnonymousLogin()