Q1 2018 update for OST: A couple of twprint tweaks, plus updates for documentation and default policies.
- twprint can now print reports for individual objects.
- twprint now has verbosity levels for --print-dbfile mode.
- Provide a useful README.md (issue #17 ).
- Document return codes in man pages (issue #28 ).
- Update install script after testing on additional platforms.
- Provide default policies for more operating systems, and update some existing policies
- Usability tweaks to twtest.
- Clean up code style with clang-format, & add a custom style that approximates existing OST usage.
- Update copyright dates to 2018.