Fix max lines being exceeded (#115)

The max lines check at line 104 isn't sufficient because multiple lines can be parsed in one go before the next check is conducted.

library/src/main/java/com/bluejamesbond/text/StringDocumentLayout.java

@@ -191,7 +191,11 @@ public boolean onMeasure(IProgress<Float> progress, ICancel<Boolean> cancelled)
                 // Next line
                 lineNumber++;
 
-                // Chcek cancelled
+                if (lineNumber >= params.maxLines) {
+                    break main;
+                }
+
+                // Check cancelled
                 if (cancelled.isCancelled()) {
                     done = false;
                     break;
@@ -573,4 +577,4 @@ public LineAnalysis(int start, int end, float remainWidth) {
             this.remainWidth = remainWidth;
         }
     }
-}
+}