Add makefile targets for doc8 lint, fix formatting/spelling issues

Change-Id: I0f45ffe0ba94fab89f9b38c9b73ed7b9091f1795
diff --git a/docs/source/operations.rst b/docs/source/operations.rst
index 0879a84..cc977f3 100644
--- a/docs/source/operations.rst
+++ b/docs/source/operations.rst
@@ -60,4 +60,5 @@
       get
       list
       poweron
-      shutdown
\ No newline at end of file
+      shutdown
+