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/items/materials/ItemMultiMaterial.java

@@ -179,7 +179,7 @@ public class ItemMultiMaterial extends AEBaseItem implements IStorageComponent,
 				if( this.dmgToMaterial.get( newMaterialNum ) == null )
 					this.dmgToMaterial.put( newMaterialNum, mat );
 				else
-					throw new RuntimeException( "Meta Overlap detected." );
+					throw new IllegalStateException( "Meta Overlap detected." );
 
 				return mat.stackSrc;
 			}
@@ -187,7 +187,7 @@ public class ItemMultiMaterial extends AEBaseItem implements IStorageComponent,
 			return mat.stackSrc;
 		}
 		else
-			throw new RuntimeException( "Cannot create the same material twice..." );
+			throw new IllegalStateException( "Cannot create the same material twice..." );
 	}
 
 	public void makeUnique()
@@ -359,7 +359,7 @@ public class ItemMultiMaterial extends AEBaseItem implements IStorageComponent,
 		}
 		catch( Throwable t )
 		{
-			throw new RuntimeException( t );
+			throw new IllegalStateException( t );
 		}
 
 		eqi.motionX = location.motionX;