Add Entity#to_h
Repository#find returns nil instead of raising exception
Merge pull request #99 from joneslee85/old-hash

Add Entity#to_h - old version
Make Lotus::Entity#to_h twice faster. Ref #99

Benchmarks available at:
  https://gist.github.com/jodosha/450f93dd46feea4379c1
Merge branch 'joneslee85-deprecate-entity-not-found-exception'
Lotus::Repository doc cleanup. Per #103