New features:
* openstack: Add support for optional floating ip pool (thanks @meteorfox, GH-861)
* openstack: Use Keystone session for handling authentication (thanks @meteorfox, GH-870)
* Support object storage classes in object storage service benchmarks (GH-895)
* Add Object Size Distributions in object storage service benchmarks (GH-888)
* Add MultiStreamThroughput benchmark to object storage benchmarks (GH-840)
* Adds a SPEC SFS 2014 benchmark which runs against GlusterFS (GH-876)
* gce_virtual_machine: Support user provided instance metadata (GH-859)
Improvements and fixes:
* openstack: Wait until VM deletion has been completed (thanks @meteorfox, GH-904)
* openstack: Fix floating IP allocation and deallocation (thanks @meteorfox, GH-862)
* rackspace: Fix missing flags bug (thanks @meteorfox, GH-903)
* Allow user to specify a flag when they run object storage benchmark on GCP, and default that flag to the latest known working version. (GH-925)
* Update mechanism used to get iperf server process id. (GH-921)
* Rename variables and improve documentation of BaseOsMixin.PullFile. (GH-923)
* Fix WindowsMixin._GetNumCpus when more than one Win32_processor exists. (GH-920)
* Add exception types to except clauses. (GH-893)
* Add Flag for List Consistency Iterations (GH-889)
* Add unit tests for scripts (GH-882)
* Add disk type examples to README.md (GH-871)
* Copy-edit the README (GH-877)
* Turn off selinux for mongodb. (thanks @akrzos, GH-867)
* Use temp files for Popen stdout and stderr in IssueCommand. (GH-878)
