Removed symlinks from disk cache

v0.0.5

Merge branch 'dev'

Compatibility with a wider range of `cloudpickle` versions

Merge pull request #42 from neuro-ml/dev

Removed dead code

Usability improvements and several bugfixes

• Fixed a bug with duplicates in output nodes
• Added several consistency checks for Storage
• Added an optional fetch argument to Storage's methods

Released on PyPi

The project is finally available via PyPi