Update README

Author: drdavella

README.md

@@ -1,2 +1,12 @@
 # security
 Security toolkit for the Python community
+
+This library includes a number of code security controls for various application security vulnerability categories. It can be used directly by programmers, but you may have been introduced to it by having it directly added to you code by automation.
+
+Many of the APIs provided are meant to be drop-in replacements that either offer more secure defaults, harden against common attacks, or at least surface the security questions developers should answer when using risky APIs.
+
+## Installation
+
+To install this package from PyPI, use the following command:
+
+`pip install security`