Fixed lists ignoring arguments

Copy URL's query string in PaginatedIterator, so any filters set by methods like objectList(), recordList(), etc. are copied as well.
Fixes issue #267
Merge pull request #268 from lasher/master

Fixed lists ignoring filter arguments
Changes to query handling in iterator
Merge branch 'master' of github.com:rackspace/php-opencloud into working
Updating Guzzle dependency versions
Adding OpenStack "Getting Started" guide
Fixing appendation rules for PaginatedCollection
Fixing server keypairs
Post-merge fixes