Add rcng glue for middleware bits. Start removing legacy ix-* rc scripts.
Delete extraneous files from destination directory to help track plist bugs in build system.
Don't deploy *.pyc files.
Another bulk update of various middleware parts.

In particular:
* rcng glue for middleware
* Accounts and services are now managed by dispatcher
* Started removing unused ix-* rc scripts
* Plugins are better sandboxed (server catches all exceptions occured inside plugin code)
* New plugins: ConfigPlugin and FilesystemPlugin