Fixed bug where cutting beam could desync the player from the server.
Fixed bug where cutting beam was invisible when used on blocks.
Fixed bug where beams would not be fired horizontally (as bolts are)
when the player is sneaking.
Moved registering entity renderers to a client-side proxy class. Load
bolt/beam textures on startup to prevent the momentary pause the first
time the player fires.
Minor reorganization of config object.