add readme license and information

LICENSE

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+MIT License
+
+Copyright (c) 2017 Ran Yitzhaki
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# qnm
+> query node_modules
+
+A simple cli utility for querying the `node_modules` directory.
+
+## why?
+> most bugs are caused by the assumptions we didn't realize we were making.
+
+When debugging a problem, I sometimes find myself checking what are the **real™** versions of the modules within `node_modules` directory, i want to be able and check a specific module, list them all, get diffs between two repositories etc...
+
+This tool should help me ease and improve this workflow.
+
+## Installation
+```bash
+npm i --global qnm
+```
+
+## Usage
+```bash
+qnm [module]
+```
+
+For example, if you want to see the installed version of `lodash`:
+
+```bash
+qnm lodash
+```
+
+## License
+The MIT License

package.json

@@ -1,16 +1,21 @@
 {
   "name": "qnm",
   "version": "0.1.0",
-  "description": "query node_modules directory",
+  "description": "cli utility for querying the node_modules directory",
   "bin": "bin/qnm.js",
   "main": "workspace.js",
+  "repository": "ranyitz/qnm",
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
+  "engines": {
+    "node": ">=8.7"
+  },
   "keywords": [
     "query",
     "node_modules",
-    "version"
+    "version",
+    "cli"
   ],
   "author": "Ran Yitzhaki",
   "license": "MIT",