Add info for the v2.7.0 release.
Add info for the v2.7.0 release.

mistio/libcloud,andrewsomething/libcloud,mistio/libcloud,Kami/libcloud,apache/libcloud,mistio/libcloud,andrewsomething/libcloud,apache/libcloud,Kami/libcloud,apache/libcloud,Kami/libcloud,andrewsomething/libcloud