Merge pull request #1 from nyndesigns/opencloudupdates

updated opencloud libs with most recent version -- fixes bug in PHP < 5....
added some basic comments for methods, ability to pull the last response after a request is made (useful for inspecting the html response after a bulk delete or extraction), reset for errors + last response before requests to maintain a consitent state between a request those messages, param to add_object to allow tar / tar.gz / tar archives to be extracted once uploaded, method for bulk deleting objects in a container (currently commented out until I have made a commit and pull request to the rackspace php sdk
Added tar as available extraction type to rackspace php sdk. I have a pull request open for this commit https://github.com/nyndesigns/php-opencloud/commit/e890ac0d3092105c981c7631f8c3b4292711813d already, but no harm in merging it here in the meantime
added info to add_object method comment for information regarding archive extraction
Added additional params param to the add_object method, as well as additional documentation on when / how to use it
Merge pull request #4 from nyndesigns/master

Minor updates