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/fixed/canon_fixed_lenses.toml

@@ -0,0 +1,15 @@
+[[lenses]]
+mount = "fixed"
+make = "Canon"
+model = "PowerShot SX70 HS"
+focal_range = [[38, 10], [247, 1]]
+aperture_range = [[34, 10], [65, 10]]
+key = "canon_powershot_sx70hs_lens"
+
+[[lenses]]
+mount = "fixed"
+make = "Canon"
+model = "PowerShot SX60 HS"
+focal_range = [[38, 10], [247, 1]]
+aperture_range = [[34, 10], [65, 10]]
+key = "canon_powershot_sx60hs_lens"