Update README (#107)

* Update description

Updated the main description and minor  corrections.

* Description update

Main description updated, and minor corrections.

Co-authored-by: Christian Martorella <laramies@gmail.com>

README.md

@@ -7,9 +7,9 @@
 [![Total alerts](https://img.shields.io/lgtm/alerts/g/Skyscanner/cfripper.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/Skyscanner/cfripper/alerts/)
 [![Language grade: Python](https://img.shields.io/lgtm/grade/python/g/Skyscanner/cfripper.svg?logo=lgtm&logoWidth=18)](https://lgtm.com/projects/g/Skyscanner/cfripper/context:python)
 
-Library and CLI tool for analysing CloudFormation templates and check them for security compliance.
+CFRipper is a Library and CLI security analyzer for AWS CloudFormation templates. You can use CFRipper to prevent deploying insecure AWS resources into your Cloud environment. You can write your own compliance checks by adding new custom plugins.
 
-Docs available in https://cfripper.readthedocs.io/
+Docs and more details available in https://cfripper.readthedocs.io/
 
 ## CLI Usage
 
@@ -26,7 +26,7 @@ Analysing /tmp/root_bypass.json...
 Valid: True
 ```
 
-### Using resolve flag
+### Using the "resolve" flag
 ```bash
 $ cfripper /tmp/root.yaml /tmp/root_bypass.json --format txt --resolve
 Analysing /tmp/root.yaml...