Flamethrower partially implemented.

I decided on making it default to the old style. The alternate model will be available as a separate add-on, rather than use a cvar, because damn if that was complicated to add.
Fix Impaler select anim when thrown and picked back up.

cvarinfo.txt

@@ -38,9 +38,6 @@ server bool sting_riflel = false;	// old rifle flashlight
 server bool sting_razor = false;	// razorjack blade charging
 					// hold primary fire to increase the
 					// spin up to 3 levels
-server bool sting_flamet = false;	// use flamethrower model based on old
-					// design and texture rather than the
-					// modern redesign
 server bool sting_automags = false;	// automag dual wielding
 					// oldskool did this, and you'll come
 					// to realize that it wasn't a good