Add ietf-inet-types@2013-07-15 and ietf-yang-types@2013-07-15.  Rename
older versions as ietf-inet-types@2010-09-24.yang and
ietf-yang-types@2010-09-24.yang.

Change-Id: I1df03675f6796440c71ad4ab41b0e04a20f5a716
Signed-off-by: Rob Adams <readams@readams.net>
Merge "Add ietf-inet-types@2013-07-15 and ietf-yang-types@2013-07-15.  Rename older versions as ietf-inet-types@2010-09-24.yang and ietf-yang-types@2010-09-24.yang."