Add project description to README.md
Add simple project description to README.md.
Signed-off-by: Dan Handley <dan.handley@arm.com>
diff --git a/README.md b/README.md
index 83c0fe1..f8bb346 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
README for Mbed TLS
===================
+Mbed TLS is a C library that implements cryptographic primitives, X.509 certificate manipulation and the SSL/TLS and DTLS protocols. Its small code footprint makes it suitable for embedded systems.
+
Configuration
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