networking: New subproject.

Add scalar and NEON ones' complement checksumming implementations for
AArch64 and Armv7-A.
diff --git a/README b/README
index 440f08a..f9df6f9 100644
--- a/README
+++ b/README
@@ -17,6 +17,9 @@
 math/include/   - math library public headers.
 math/test/      - math test and benchmark related sources.
 math/tools/     - tools used for designing the algorithms.
+networking/     - networking subproject sources.
+networking/include/ - networking library public headers.
+networking/test/ - networking test and benchmark related sources.
 string/         - string routines subproject sources.
 string/include/ - string library public headers.
 string/test/    - string test and benchmark related sources.