Improved exceptions

Many exceptions got an improvement due to changed class or description or details it is providing.
Is not complete, needs to be done in patches in the regions, where it is needed, since some are just
swallowed.

Removed total usage of pure RuntimeExceptions to 0.

src/main/java/appeng/me/GridNode.java

@@ -305,7 +305,7 @@ public class GridNode implements IGridNode, IPathItem
 			this.setGridStorage( WorldSettings.getInstance().getGridStorage( node.getLong( "g" ) ) );
 		}
 		else
-			throw new RuntimeException( "Loading data after part of a grid, this is invalid." );
+			throw new IllegalStateException( "Loading data after part of a grid, this is invalid." );
 	}
 
 	@Override

src/main/java/appeng/me/NetworkEventBus.java

@@ -71,16 +71,16 @@ public class NetworkEventBus
 							classEvents.put( listAs, thisEvent );
 						}
 						else
-							throw new RuntimeException( "Invalid ME Network Event Subscriber, " + m.getName() + "s Parameter must extend MENetworkEvent." );
+							throw new IllegalStateException( "Invalid ME Network Event Subscriber, " + m.getName() + "s Parameter must extend MENetworkEvent." );
 					}
 					else
-						throw new RuntimeException( "Invalid ME Network Event Subscriber, " + m.getName() + " must have exactly 1 parameter." );
+						throw new IllegalStateException( "Invalid ME Network Event Subscriber, " + m.getName() + " must have exactly 1 parameter." );
 				}
 			}
 		}
 		catch( Throwable t )
 		{
-			throw new RuntimeException( "Error while adding " + c.getName() + " to event bus", t );
+			throw new IllegalStateException( "Error while adding " + c.getName() + " to event bus", t );
 		}
 	}
 
@@ -179,7 +179,7 @@ public class NetworkEventBus
 				AELog.severe( "Offending Class: " + obj.getClass().getName() );
 				AELog.severe( "Offending Object: " + obj.toString() );
 				AELog.error( e1 );
-				throw new RuntimeException( e1 );
+				throw new IllegalStateException( e1 );
 			}
 
 			if( e.isCanceled() )

src/main/java/appeng/me/cache/CraftingGridCache.java

@@ -501,7 +501,7 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 	{
 		if( world == null || grid == null || actionSrc == null || slotItem == null )
 		{
-			throw new RuntimeException( "Invalid Crafting Job Request" );
+			throw new IllegalArgumentException( "Invalid Crafting Job Request" );
 		}
 
 		CraftingJob job = new CraftingJob( world, grid, actionSrc, slotItem, cb );

src/main/java/appeng/me/cache/NetworkMonitor.java

@@ -140,6 +140,6 @@ public class NetworkMonitor<T extends IAEStack<T>> extends MEMonitorHandler<T>
 
 		final NetworkMonitor<?> last = DEPTH.pop();
 		if( last != this )
-			throw new RuntimeException( "Invalid Access to Networked Storage API detected." );
+			throw new IllegalStateException( "Invalid Access to Networked Storage API detected." );
 	}
 }

src/main/java/appeng/me/cluster/implementations/CraftingCPUCluster.java

@@ -934,7 +934,7 @@ public class CraftingCPUCluster implements IAECluster, ICraftingCPU
 
 	public IAEItemStack getItemStack( IAEItemStack what, CraftingItemList storage2 )
 	{
-		IAEItemStack is = null;
+		IAEItemStack is;
 		switch( storage2 )
 		{
 			case STORAGE:
@@ -960,7 +960,7 @@ public class CraftingCPUCluster implements IAECluster, ICraftingCPU
 				break;
 			default:
 			case ALL:
-				throw new RuntimeException( "Invalid Operation" );
+				throw new IllegalStateException( "Invalid Operation" );
 		}
 
 		if( is != null )

src/main/java/appeng/me/storage/NetworkInventoryHandler.java

@@ -168,7 +168,7 @@ public class NetworkInventoryHandler<T extends IAEStack<T>> implements IMEInvent
 	private void surface( NetworkInventoryHandler<T> networkInventoryHandler, Actionable type )
 	{
 		if( this.getDepth( type ).pop() != this )
-			throw new RuntimeException( "Invalid Access to Networked Storage API detected." );
+			throw new IllegalStateException( "Invalid Access to Networked Storage API detected." );
 	}
 
 	private LinkedList getDepth( Actionable type )