added readme for the gerrit widget

gerrit-widget/README.md

@@ -0,0 +1,55 @@
+# Gerrit widget
+
+This widget adds support for [Gerrit](https://www.gerritcodereview.com/). It shows number of currently assigned reviews to the user and shows a notification when new review is assigned. 
+
+## Customization
+
+It is possible to customize widget by providing a table with all or some of the following config parameters:
+
+| Name | Default | Description |
+|---|---|---|
+| `host` | Required | Ex https://gerrit.tmnt.com |
+| `query` | `is:reviewer AND status:open AND NOT is:wip` | Query to retrieve reviews |
+
+## Prerequisite
+
+ - [curl](https://curl.haxx.se/) - is used to communicate with gerrit's [REST API](https://gerrit-review.googlesource.com/Documentation/rest-api.html)
+ - setup [netrc](https://ec.haxx.se/usingcurl-netrc.html) it is used to store username and password in order to call API's endpoints.
+
+## Installation
+
+1. Download json parser for lua from [github.com/rxi/json.lua](https://github.com/rxi/json.lua) and place it under **~/.config/awesome/** (don't forget to star a repo):
+
+    ```bash
+    wget -P ~/.config/awesome/ https://raw.githubusercontent.com/rxi/json.lua/master/json.lua
+    ```
+
+1. Clone this repo (if not cloned yet) under **~/.config/awesome/**:
+
+    ```bash
+    git clone https://github.com/streetturtle/awesome-wm-widgets.git ~/.config/awesome/
+    ```
+
+1. Require weather widget at the top of the **rc.lua**:
+
+    ```lua
+    local gerrit_widget = require("awesome-wm-widgets.gerrit-widget.gerrit")
+    ```
+
+1. Add widget to the tasklist:
+
+    ```lua
+    s.mytasklist, -- Middle widget
+        { -- Right widgets
+            layout = wibox.layout.fixed.horizontal,
+            ...
+            --default
+            gerrit_widget({host = 'https://gerrit.tmnt.com'}),
+            --customized
+            gerrit_widget({
+                host = 'https://gerrit.tmnt.com',
+                query = 'is:reviewer AND is:wip'
+            })
+            ...
+    ```
+