added basic usage

README.md

@@ -19,3 +19,21 @@
       <img src="https://img.shields.io/github/issues-closed-raw/s0md3v/Bolt.svg">
   </a>
 </p>
+
+### Important
+Bolt is in alpha phase of development which means it's full of bugs. Any production use of this tool discouraged.
+
+### Usage
+
+Scanning a website for CSRF using Bolt is as easy as doing
+```
+python3 bolt.py -u https://github.com -l 2
+```
+Where `-u` is used to supply the URL and `-l` is used to specify the depth of crawling.
+
+Other options and switches:
+
+- `-t` number of threads
+- `--delay` delay between requests
+- `--timeout` http request timeout
+- `--headers` supply http headers