0.6.1 Release

If you want code in the 0.6.1 release, this is the branch to make your Pull Request into. Cheers!

ToDos for 0.6.1:
- [x] make `WordCramEngine` work off an `Iterator<EngineWord>`, not a `EngineWord[]` and an integer index. 
- [ ] simpsus' shape based filter stuff
- [ ] figure out a clean way to have lots of components (maybe in their own package?), so we don't need a WordCramContrib project
- [ ] Make right-to-left a property on Words, so it can be set individually. (See https://github.com/danbernier/WordCram/issues/43)
- [x] bug fixes! (placeholder)