Rewrite in Rust (#3)

Just what the world needs, another silly Rust re-write! But it was a good exercise in learning.

There's a lot of messy things, which is why this is 0.2.0-pre.1. Going to make some cleaning passes after landing this.

resources/skel/photojawn.conf.yml

@@ -0,0 +1,9 @@
+# Max size of thumbnails when viewing an album
+thumbnail_size: [256, 256]
+
+# Max size of images when viewing a single one on screen
+view_size: [1024, 768]
+
+# Directory where the generated site will be created in. All original images will be
+# copied in to here with the same directory structure.
+output_dir: "site"