Changelog/doc/test updates for various new operations

Dependency version bumps

package.json

@@ -58,11 +58,11 @@
     "vips"
   ],
   "dependencies": {
-    "bluebird": "^3.3.5",
-    "color": "^0.11.1",
-    "nan": "^2.2.1",
-    "semver": "^5.1.0",
-    "request": "^2.71.0",
+    "bluebird": "^3.4.1",
+    "color": "^0.11.3",
+    "nan": "^2.4.0",
+    "semver": "^5.2.0",
+    "request": "^2.73.0",
     "tar": "^2.2.1"
   },
   "devDependencies": {
@@ -71,11 +71,11 @@
     "coveralls": "^2.11.9",
     "exif-reader": "^1.0.0",
     "icc": "^0.0.2",
-    "istanbul": "^0.4.3",
+    "istanbul": "^0.4.4",
     "mocha": "^2.5.3",
     "mocha-jshint": "^2.3.1",
     "node-cpplint": "^0.4.0",
-    "rimraf": "^2.5.2",
+    "rimraf": "^2.5.3",
     "unzip": "^0.1.11"
   },
   "license": "Apache-2.0",