Added README

README.md

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+# Postwoman Extension for Google Chrome
+
+<a href="https://chrome.google.com/webstore/detail/postwoman-extension-for-c/amknoiejhlmhancpahfcfcfhllgkpbld">![Get the add-on](https://developer.chrome.com/webstore/images/ChromeWebStore_Badge_v2_206x58.png)</a>
+
+**Haven't tried Postwoman yet ? Try it at [https://postwoman.io/](https://postwoman.io/)**
+
+<br />
+This extension currently provides the following features to Postwoman.
+
+- Overrides CORS restrictions for cross-origin requests.
+
+
+### Building & Experimentation
+- Setup a local copy of postwoman repo [(Instructions)](https://github.com/liyasthomas/postwoman#developing-)
+- Clone the repo
+- Then head into the `manifest.json` file and edit it to match this snippet below
+
+```
+  "content_scripts": [
+    {
+      "matches": [
+        "*://*/*",
+        "https://postwoman.io/",
+        "https://postwoman.io/*",
+        "https://postwoman.netlify.com/*",
+        "https://postwoman.netlify.com/"
+      ],
+      "js": [ "contentScript.js" ]
+    }
+  ],
+```
+- Run `npm install`
+- Run `npm run build` to generate the *dist* folder
+- Open Chrome and navigate to `chrome://extensions`, click on Load Unpacked and then select the generated dist folder.
+- Copy the generated extension ID and paste it to the `EXTENSION_ID` property in the Postwoman repo's `functions/strategies/ChromeStrategy.js` file.
+
+<br />
+<br />
+Postwoman is built with help of an amazing group of people.
+<br />
+Contribute to Postwoman: <a href="https://github.com/liyasthomas/postwoman">https://github.com/liyasthomas/postwoman</a>
+<br/>
+
+Sponsor Postwoman: [OpenCollective](https://opencollective.com/postwoman)
+
+
+<br />
+<br />
+<p align="center"><b>made with ❤️ by <a href="https://github.com/AndrewBastin">andrew bastin</a></b></p>
+
+