Couchbase site provider. Added CustomerErrorProvider and UrlRedirectProvider.
regen uuid when import site.
Added ABTest providers.
Fixed the ABProvider bug.
Fixed a title bug. In url redirect import page. The title should be "import url redirects", but not "import custom error"
1,Sub sites export.
2,Site null bug.
Merge pull request #1 from Kooboo/master

Merge
Fixed the site null bug.
Merge pull request #222 from ZhiGuang/master

CouchBase Providers