add flush() method to Chunk
add slow manual test (when module called as main) to check time roundtrips through string format for data integrity
add --smart-dump which pretty-prints streamcorpus chunks.
fix --stats
pure python build/install using setuptools
Makefile remains as passthrough to setup.py for convenience
Merge remote-tracking branch 'origin/v0.3.0-dev' into v0.3.0-dev

Conflicts:
	py/Makefile
	py/src/streamcorpus/dump.py
Merge pull request #3 from brianolson/v0.3.0-dev

V0.3.0 dev