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/pentax/k-s2.toml

@@ -0,0 +1,12 @@
+make = "RICOH IMAGING COMPANY, LTD."
+model = "PENTAX K-S2"
+clean_make = "Pentax"
+clean_model = "K-S2"
+#blackpoint = 16
+whitepoint = 4079
+color_pattern = "RGGB"
+active_area = [0, 0, 12, 0]
+crop_area = [10, 4, 22, 12]
+
+[cameras.color_matrix]
+D65 = [5.2900, -1.6627, -0.7529, -2.5443, 8.0936, 1.1071, -0.5585, 0.9879, 4.1775]