Added missing top-level meta files to MANIFEST.in
Added dist/create-release.sh script.
Bumped version.
Removed accidental exit 0.
Added more include rules to .gitignore.
Removed print statement.
RelaxedDateTime is very relaxed.
Removed RelaxedDateTime extra field from core library.
Added missing WriterException import in dr/__init__.py
Improved error reporting when a docrep field's `to_wire` method throws
an exception. Fixes #1.
Merge remote-tracking branch 'origin/develop'