patched php_sdb2's listDomains() function to save NextToken so we can actually get to all our aws sdb domains

updated GO_Simple_DB::check_domains() function to page through all the aws sdb domains we have.
commented on our php_sdb2 patch to fix the missing NextToken issue in listDomains().
moved the copy_sdb_domains WP-CLI function from go-mcsync-reports to go-simple-db (and renamed to copy_domains)

somewhat related to https://github.com/GigaOM/legacy-pro/issues/1111 since we needed to rename (copy) go-mailchimp-reports domain to go-mcsync-reports.
forget about the config file! get the aws access and secret keys from WP-CLI's command line
Merge pull request #8 from wluo/nexttoken-fix

simpledb nexttoken fix