Toolset directory reorganization

Part of #448 - Directory structure re-organization.

This patch moves all benchmark toolset files into a dedicated directory (toolset) and organizes them by subject:

* /toolset/benchmark: files related with running the benchmark (after everything is installed)
* /toolset/deployment: tools and documentation related with provisioning the required hosts
* /toolset/setup: tools and documentation related with installing the benchmark suite and its dependencies on the hosts provisioned

In this version, "deployment" only contains documentation, but the plan is that it will have scripts for automated deployment to different environments.