Ecomment

Fixed
- Save inline commented line to before context instead of just leaving it off.
- Get context from 'lines' instead of 'line'. It was just grabing characters at
the beginning and the end of the current line before.
Changed
- Use underscores in context json keys to be more compatible with Javascript
and some other languages that parse json into objects.

Added
- Initial test for `ecomment read` cli command.
Changed
- Use absolute imports for tests.
- Rename file-data to file\_data.
Fixed
- Return files in 'files' from 'read' to make the response valid json.
- Remove extra newlines from markup output.

Changed
- Use default line length for Black formatting instead of 120.
Fixed
- Fix bugs in `ecomment.strip` so it passes the tests.