Added module and function docstrings
diff --git a/asn1crypto/ocsp.py b/asn1crypto/ocsp.py
index af913b0..18a2e03 100644
--- a/asn1crypto/ocsp.py
+++ b/asn1crypto/ocsp.py
@@ -1,4 +1,15 @@
# coding: utf-8
+
+"""
+ASN.1 type classes for the online certificate status protocol (OCSP). Exports
+the following items:
+
+ - OCSPRequest()
+ - OCSPResponse()
+
+Other type classes are defined that help compose the types listed above.
+"""
+
from __future__ import unicode_literals
from .algos import DigestAlgorithm, SignedDigestAlgorithm