add README.md

Author: abhisheksoni27

Diff for: README.md

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+# wilson
+**wilson** - quickly write tests for APIs using JSON configs
+
+# Installation
+
+```
+go get github.com/abhisheksoni27/wilson
+```
+
+This will install the `wilson` command in your `GOBIN`
+
+# Usage
+  wilson [command]
+
+### Available Commands
+  `help`        Help about any command
+  
+  
+  `run`         run all tests in config directory
+
+### The run command
+run all tests in config directory
+
+**Usage:**
+
+```
+wilson run [flags]
+```
+
+**Flags:**
+
+  `-c, --config` **string**               _config directory (default is $HOME/.wilson/)_
+  
+  
+  `-m, --max-tests-at-a-time` **int**   _max-tests-at-a-time number of tests to run in parallel (default 4)_