parse_stream implementation
More focused test on iteration
Unparse stream
Beginning of streaming load
Merge branch 'tagged-value-fix' into streaming
Readers & default for streaming
Write to stream
dump, with docs
Merge branch 'master' into streaming

Conflicts:
	edn/_ast.py
	edn/tests/test_ast.py
	edn/tests/test_extended.py
Merge branch 'master' into streaming
Merge pull request #17 from jml/streaming

Streaming support for load & dump