v1.0.0 Alpha

Release candidate for the initial MAEC to STIX release.
I commented on the commit, but I should have probably put it here :-\ I was wondering if we could align the `infile` and `outfile` params with the `--infile` and `--outfile` longopts in `maec_extract_indicators.py`. Also, having `--outfile` default to `sys.stdout` in both would be awesome! (though not necessary, heh).