Merge pull request #2 from gsakkis/master

v0.3 release
Merge pull request #4 from gsakkis/master

v0.3.1
Merge pull request #6 from gsakkis/master

Allow custom handling for missing Nullable properties
Add PY3 support. PEP8 Changes
Merge pull request #7 from ruairif/master

Add PY3 support. PEP8 Changes
Bumped version to 0.4