Automatically remove any `.git` directories within the project's
dependencies, such as within contrib modules like Plausible which caused
`web/modules/contrib` to keep appearing and being added to the index.
Update the ordering of the future talks on the talks page so that
upcoming talks are shown in chronological order (soonest first),
followed by past talks in reverse chronological order (most recent
first).
This still uses the `created` date for ordering, which is updated
automatically on saving the node to match the furthest future talk, but
I may want to move that into a custom node property at some point.
Fixes#140
Oliver Davies