docs: Extend readme, more docs

Adds/updates docs.

Bug: 125, 129

Change-Id: I96b8bc07c3817d6b629e546f74c06d7345b3227e
diff --git a/docs/targets.rst b/docs/targets.rst
index e16b012..22784ce 100644
--- a/docs/targets.rst
+++ b/docs/targets.rst
@@ -1,3 +1,5 @@
+.. _chapter-targets:
+
 =======
 Targets
 =======