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/venus.toml

@@ -0,0 +1,8 @@
+[[lenses]]
+mount = "ef-mount"
+key = "LAOWA 100mm F2.8 CA-Dreamer Macro 2x"
+lens_id = 173
+make = "Venus"
+model = "Laowa 100mm F2.8 2X Ultra Macro APO"
+focal_range = [[100, 1], [100, 1]]
+aperture_range = [[28, 10], [28, 10]]