cumulative scrobble graph and dark theme

src/main/java/sarsoo/fmframework/fx/controller/ScrobblesViewPaneController.java

@@ -82,8 +82,11 @@ public class ScrobblesViewPaneController {
 					calendar.addCount(scrobbleDate.getMonth(), scrobbleDate.getYear());
 				}
 				
+				int cumulative = 0;
+				
 				for(MonthScrobbles month: calendar.getMonthScrobbles()) {
-					series.getData().add(new Data<String, Integer>(month.toString(), month.getCount()));
+					cumulative += month.getCount();
+					series.getData().add(new Data<String, Integer>(month.toString(), cumulative));
 				}
 
 				areaChart.getData().add(series);

src/main/resources/sarsoo/fmframework/fx/styles/mainPane.css

@@ -17,10 +17,22 @@
 	-fx-start-angle: 90;
 }
 
+.chart-vertical-grid-lines {
+	-fx-stroke: #404040;
+}
+
+.chart-horizontal-grid-lines {
+	-fx-stroke: #404040;
+}
+
 .chart-bar {
 	-fx-background-color: #202124;
 }
 
+.chart-plot-background {
+	-fx-background-color: transparent;
+}
+
 .chart-pie-label {
 	-fx-fill: white;
 }