Various fixes for `genesis:permissions`

* #39 - run permission/ownership commands with sudo
* #35 - add www-data user to deploy group
* #33, #20 - fixed -follow flag for `find`, added `chmod g+s` for directories
Added FS_METHOD setting of "direct"

This makes sense since the server we're provisioning has neither ftp nor keyless ssh support, and permissions should allow for direct filesystem io
Merge branch 'master' into 39-permissions-fixes

Conflicts:
	provisioning/roles/common/tasks/main.yml
Merge pull request #54 from genesis/39-permissions-fixes

Various fixes for genesis:permissions