Standardize NetworkAction objects

[phogue]

Procon.Net.Protocols.Objects.Chat already uses the Then/Now/Scope attributes of NetworkAction but Procon.Net.Protocols.Objects.Kill still uses a very specialized object.

Moving Kick/Kill and other NetworkAction objects over to use these three NetworkActionData fields (or creating new fields like "Instigator" and some clever antonym of instigator that I can't think of right now) will allow for multiple actions to be taken on a single object, so a plugin can list 5 players they want to Move/Kick/Kill and the appropriate action will be taken.

The work's already half done, I've just been lazy.