add bin entry to package.json to point to cli

Author: Matthew Wonlaw

package.json

@@ -1,6 +1,6 @@
 {
   "name": "better-sqlite3-bedrock",
-  "version": "1.0.3",
+  "version": "1.0.4",
   "description": "The fastest and simplest library for SQLite3 in Node.js.",
   "homepage": "https://github.com/tantaman/better-sqlite3-bedrock",
   "author": "Matt Wonlaw",
@@ -9,6 +9,9 @@
     "url": "git://github.com/tantaman/better-sqlite3-bedrock.git"
   },
   "main": "lib/index.js",
+  "bin": {
+    "zero-sqlite3": "./build/Release/shell"
+  },
   "files": [
     "binding.gyp",
     "src/*.[ch]pp",