New Feature: Multi-Pane Charts

- Added the create_subchart method to Chart.
- Added the SubChart class.
- Added an inner_width and inner_height parameter to Chart.
- The time_scale method can now disable the time scale completely.

Bugs:
- Fixed a bug which prevented markers from being placed on charts with a timescale less than a day.

examples/5_styling/styling.py

@@ -4,7 +4,7 @@ from lightweight_charts import Chart
 
 if __name__ == '__main__':
 
-    chart = Chart(debug=True)
+    chart = Chart()
 
     df = pd.read_csv('ohlcv.csv')