Next-action

Fixed

- Allow for putting the `--blocked` option in the configuration file. Fixes 204.

Added

- Show tasks blocked by the next action using the `--blocked` option. Closes 166.

Fixed

- Give proper error message when the `--number` argument is smaller than one. Fixes 164.

Fixed

- Allow for using `--config` when generating a configuration file with `--write-config-file` so it is possible to
ignore the existing configuration file when generating a new one. Fixes 161.

Fixed

- Add support for Python 3.7.

Fixed

- When generating a configuration file with `--write-config-file` also include context and project filters passed on
the command-line. Fixes 141.
- When generating a configuration file with `--write-config-file` also include the minimum priority if passed on the
command-line. Fixes 142.
- Accept other arguments after excluded contexts and projects. Fixes 143.

Added

- When generating a configuration file with `--write-config-file` add any other options on the command-line to the
generated configuration file. Closes 78.