Add design-docs directory
Add design-docs directory

Change-Id: I9caf1a1a1c9868e9bdf1774920b9eda326b4efa5
Reviewed-on: http://gerrit.cloudera.org:8080/2201
Reviewed-by: Misty Stanley-Jones <b9f9ef9e00c258208ea831c64cc129eda4ac78b4@apache.org>
Tested-by: Misty Stanley-Jones <b9f9ef9e00c258208ea831c64cc129eda4ac78b4@apache.org>

InspurUSA/kudu,InspurUSA/kudu,andrwng/kudu,andrwng/kudu,helifu/kudu,InspurUSA/kudu,andrwng/kudu,cloudera/kudu,InspurUSA/kudu,helifu/kudu,cloudera/kudu,helifu/kudu,helifu/kudu,andrwng/kudu,andrwng/kudu,cloudera/kudu,EvilMcJerkface/kudu,andrwng/kudu,EvilMcJerkface/kudu,andrwng/kudu,helifu/kudu,EvilMcJerkface/kudu,andrwng/kudu,cloudera/kudu,cloudera/kudu,InspurUSA/kudu,cloudera/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,InspurUSA/kudu,helifu/kudu,cloudera/kudu,InspurUSA/kudu,cloudera/kudu,EvilMcJerkface/kudu,EvilMcJerkface/kudu,helifu/kudu,andrwng/kudu,EvilMcJerkface/kudu,helifu/kudu,InspurUSA/kudu,EvilMcJerkface/kudu,cloudera/kudu,helifu/kudu