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/s3is.toml

@@ -0,0 +1,15 @@
+# CRW
+make = "Canon"
+model = "PowerShot S3 IS"
+clean_make = "Canon"
+clean_model = "PowerShot S3 IS"
+whitepoint = 1023
+color_pattern = "RGGB"
+active_area = [44,8,4,0]
+filesize = 7710960
+raw_width = 2888
+raw_height = 2136
+blackareav = [0,40]
+
+[cameras.color_matrix]
+D65 = [1.4062, -0.5199, -0.1446, -0.4712, 1.2470, 0.2243, -0.1286, 0.2028, 0.4836]