Flourish

New

* Sources can now include CSV files, which contain multiple sources
in one file.

Other changes

* Timestamps in generated CSV files now match the expected input format.

Bug fixes

* Three keys were enforced to exist in the `_site.toml` configuration
which were used by the Atom generator, even if no Atom feeds were
going to be generated. These requirements have been moved to the
Atom generator, and the `_site.toml` is now optional.
* Made some runtime errors in the command-line just use the error string
without a full stacktrace, as the stacktrace adds no useful information.

New

* Add `--invalidate` option to `flourish upload` that issues a CloudFront
invalidation on the paths uploaded.

New

* Add `exclude_future` filter to sources that will remove anything with
a `published` date in the future
* Add `future` setting to the `_site.toml` that, when set to true,
removes anything with a `published` date in the future from appearing
to any generator (easier than filtering future sources individually)
* Add `--exclude-future` and `--include-future` arguments to the
`flourish generate` command, that will override the setting in
`_site.toml` if necessary.

Bug fixes

* Remove stray `print` statement.

New

* Add a [CSV generator][csv].

Changes

* Update the [Atom generator][atom] to allow some values to be
overridden from the default. Mostly to allow the body of the Atom
entry to include more content than just the source's body.

[csv]: https://flourish.readthedocs.io/en/latest/api-flourish-generators-csv/
[atom]: https://flourish.readthedocs.io/en/latest/api-flourish-generators-atom/