Operations, formatting, clang, c++11
Mac OS X project builds
Add dump method to Operations classes.
Remove Net::Handler knowledge from Operations base classes.  Rename Target to NotificationTarget. Force operations to have a description for diagnostics purposes.
primary target is always used, so keep that separate from the option vector.  NotificationTarget needs to be enable_shared_from_this.
ignore dependency files
No need for Manager.  An Operation does everything it needs.