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/cameras/nikon/e5700.toml

@@ -0,0 +1,17 @@
+make = "NIKON"
+model = "E5700"
+clean_make = "Nikon"
+clean_model = "E5700"
+color_pattern = "RGEB" # TODO: unsupported
+active_area = [0, 0, 0, 0]
+crop_area = [8, 2, 8, 2]
+hints = ["coolpixsplit", "nowb"]
+
+[cameras.color_matrix]
+A = [-0.4675, 1.021, 0.3078, 0.666, -0.1633, 0.3746, -0.4208, 0.8856, 0.6304, 0.157, 0.7288, 0.1099]
+D65 = [-0.6475, 1.2496, 0.2428, 0.5409, -0.0016, 0.318, -0.5965, 1.0912, 0.5866, -0.0177, 0.9918, 0.0248]
+
+[[cameras.modes]]
+mode = "12bit"
+blackpoint = 0
+whitepoint = 4095