First pass at fast property access.
FastComparator and tests.
Better construction of nested entities in FastComparator tests.
Merge pull request #134 from alxhub/fast-sort-util

FastFieldAccessor and FastComparator, useful for optimizing sorting of Entities.
Make Streamy work with the majority of existing Google APIs: split object namespaces to avoid name clashes, cleanse identifier names
Support nested lists; simplify template code
Use close() instead of flush()