Fix numeric overflow

Make multiplication cumulative (handy since it's already a switch case)
Convert and use uppercase

Also remove unused statusIsOK method, or as Clou calls it, dead code

src/main/java/com/sheepit/client/Utils.java

@@ -255,23 +255,16 @@ public class Utils {
 		}
 		final Matcher m = Pattern.compile("([\\d.,]+)\\s*(\\w)").matcher(in);
 		m.find();
-		int scale = 1;
-		switch (m.group(2).charAt(0)) {
+		long scale = 1;
+		switch (Character.toUpperCase(m.group(2).charAt(0))) {
 			case 'T':
-			case 't':
-				scale = 1000 * 1000 * 1000 * 1000;
-				break;
-			case 'G':
-			case 'g':
-				scale = 1000 * 1000 * 1000;
-				break;
+				scale *= 1000; //Multiply by 1000 each time the higher the metric prefix
+			case 'G': //Note the lack of break statements, thus it executes through
+				scale *= 1000;
 			case 'M':
-			case 'm':
-				scale = 1000 * 1000;
-				break;
+				scale *= 1000;
 			case 'K':
-			case 'k':
-				scale = 1000;
+				scale *= 1000;
 				break;
 		}
 		return Math.round(Double.parseDouble(m.group(1)) * scale);