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/olympus/e-pm2.toml

@@ -0,0 +1,13 @@
+make = "OLYMPUS IMAGING CORP."
+model = "E-PM2"
+clean_make = "Olympus"
+clean_model = "E-PM2"
+#blackpoint = 0
+whitepoint = 4000
+color_pattern = "RGGB"
+active_area = [0, 0, 0, 0]
+crop_area = [8, 8, 24, 8]
+
+[cameras.color_matrix]
+A = [0.9033, -0.3597, 0.026, -0.2351, 0.97, 0.3111, -0.0181, 0.0807, 0.5838]
+D65 = [0.838, -0.263, -0.0639, -0.2887, 1.0725, 0.2496, -0.0627, 0.1427, 0.5438]