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/canon/g7x.toml

@@ -0,0 +1,13 @@
+# CRW
+make = "Canon"
+model = "Canon PowerShot G7 X"
+clean_make = "Canon"
+clean_model = "PowerShot G7 X"
+whitepoint = 4000
+color_pattern = "RGGB"
+active_area = [96, 17, 0, 0]
+blackareav = [0, 94]
+
+[cameras.color_matrix]
+A = [1.1125, -0.5937, 0.0355, -0.2979, 1.0926, 0.236, -0.0116, 0.0835, 0.6064]
+D65 = [0.9602, -0.3823, -0.0937, -0.2984, 1.1495, 0.1675, -0.0407, 0.1415, 0.5049]