changes to add auth url

this will make it work with openstack swift
changed readme to reflect auth url changes
added ping repetitions -r

-c count was already used so -r for repetitions instead
added delete object to the test set

added delete to the test set
cut and paste typo fixed for cfauthurl
changes for rackspace cloudfiles to openstack swift
missing spaces
rackepace -> rackspace or openstack swift in readme
added ref to openstack swift
clean up in line with commit
added -t TEST_DATA_SIZE
added Rackspace US as the default auth url

cloudfiles.us_authurl added
removed hard coded 37 size of string on osx

this will then work in python3 (49) as well
Merge pull request #3 from sohonet/master

default auth url and added -t TEST_DATA_SIZE