Update README.

README.rst

@@ -5,9 +5,10 @@ This is a C-level implementation of a fast, re-entrant, optimistic lock for CPyt
 It is a drop-in replacement for
 `threading.RLock <https://docs.python.org/3/library/threading.html#threading.RLock>`_.
 FastRLock is implemented in `Cython <https://cython.org>`_ and also provides a C-API
-for direct use from Cython code via ``from fastrlock cimport rlock``.
+for direct use from Cython code via ``from fastrlock cimport rlock`` or
+``from cython.cimports.fastrlock import rlock``.
 
-Under normal conditions, it is about 10x faster than threading.RLock in Python 2.7
+Under normal conditions, it is about 10x faster than ``threading.RLock`` in Python 2.7
 because it avoids all locking unless two or more threads try to acquire it at the
 same time.  Under congestion, it is still about 10% faster than RLock due to being
 implemented in Cython.