Vendor rawler 0.7.2 unmodified

The crate as crates.io publishes it, minus .cargo-ok, its Cargo.lock and
data/testdata (13 MB of sample files only its own tests read). Not yet
routed through [patch.crates-io]; the next commit is the patch.

third_party/rawler-0.7.2/data/lenses/ef_mount/irix.toml

@@ -0,0 +1,7 @@
+[[lenses]]
+mount = "ef-mount"
+lens_id = 60
+make = "Irix"
+model = "11mm f/4"
+focal_range = [[11, 1], [11, 1]]
+aperture_range = [[4, 1], [4, 1]]