Version bump: 0.2.0
Version bump: 0.2.0

Changes:
- Resource attributes (UpdatePolicy, MetaData, etc) now supported
- .add(child) methods return the added child to support dynamic creation
  of the child when .add is called, e.g.: `cft.resources.add(Resource())`

broadinstitute/cfn-pyplates,Rethought/cfn-pyplates,seandst/cfn-pyplates