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/core/Api.java

@@ -119,8 +119,9 @@ public final class Api implements IAppEngApi
 	@Override
 	public IGridNode createGridNode( IGridBlock blk )
 	{
-		if( Platform.isClient() )
-			throw new RuntimeException( "Grid Features are Server Side Only." );
+		if ( Platform.isClient() )
+			throw new IllegalStateException( "Grid features for " + blk + " are server side only." );
+
 		return new GridNode( blk );
 	}