* Add positions to month and on-this-day views.
* Nicer positioning by local storage (start at last set position).
* Smaller clusters (35, rather than default 80) gives better map views.
* Minor exif handling improvement.
* Improve diesel usage (avoid full-query verbatim sql).
* Update diesel to 1.2.x.
* Allow (keep) manually corrected positions when finding photos.
Use local storage to remember the last position set for a picture, and
use that as a starting point when positioning an image that does not
allreay have any known position.
* Add leaflet clustering; Nice handling of maps with extreme numbers of photos.
* Add photo previews to map markers.
* Update rand and memcached-rs.
* Some code-style cleanup.
* Add admin ux to set image position.
* Fix leaflet markers. Sometimes the markers would not view, that was
because the trick to find the correct url for the marker images
didn't work when the css might load after the js. So just load the
css before the js instead.
* Update ructe to 0.4.x.
* Some cleanups, mainly clippy-suggested.
Sometimes the markers would not view, that was because the trick to
find the correct url for the marker images didn't work when the css
might load after the js. So just load the css before the js instead.
* Store width and height of images. Use it to calculate width and
height of small images in lists.
Since the old database should be migratable to the new, the width
and height fields are nullable. I aim to make them not nullable
later, after all images in the database has got width and height.
* Don't override picture orientation for existing images in
findphotos.
* Don't let the map hide dropdowns.
* Shorter about string in footer.
* Use kamadak-exif instead of rexif.
* Updates Diesel to 1.1.0, get rid of unnecessary New* structs.
* Miscellaneous code cleanup.
