Allow using an enterprise artifactory.

Use a global binary_host_mirror variable in .npmrc to fetch binary requisites at install time.  This requires a small change to node-pre-gyp in lib/util/versioning.js.

Revert to using a deep path so that the local artifactory can host gyp binaries of different packages.

package.json

@@ -11,7 +11,7 @@
     "crypto"
   ],
   "main": "./bcrypt",
-  "version": "3.0.0",
+  "version": "3.0.1",
   "author": "Nick Campbell (https://github.com/ncb000gt)",
   "engines": {
     "node": ">= 6.0.0"
@@ -30,7 +30,7 @@
   },
   "dependencies": {
     "nan": "2.10.0",
-    "node-pre-gyp": "0.11.0"
+    "node-pre-gyp": "0.11.1"
   },
   "devDependencies": {
     "nodeunit": "^0.11.2"
@@ -60,7 +60,7 @@
     "module_name": "bcrypt_lib",
     "module_path": "./lib/binding/",
     "package_name": "{module_name}-v{version}-{node_abi}-{platform}-{arch}-{libc}.tar.gz",
-    "host": "https://github.com/kelektiv/node.bcrypt.js/releases/download/",
-    "remote_path": "v{version}"
+    "host": "https://github.com",
+    "remote_path": "kelektiv/node.bcrypt.js/releases/download/v{version}"
   }
 }