Remove the provision_shell_exec function, as the functionality was integrate with drush_shell_exec, and we use that instead.

the singular filesystem object now.

Sync is now a method of the server class, with a helpful method associated
to the services that redirect to the service's server.

Committed drumm's cleanup patch that takes care of permission checks inside the config writing code,
and some other fixes to get install etc. working again

This gets rid of the path function, and introduces method chaining for the file service, which results in far cleaner code.

moved the services to be properties of the env object.