Add support for longer update intervals

Load display-sizes from supported_models
Cleanup old images on new run of Inkycal

inkycal/display/supported_models.py

@@ -0,0 +1,19 @@
+supported_models = {
+    'epd_12_in_48': (1304, 984),
+    'epd_7_in_5_colour': (640, 384),
+    '9_in_7': (1200, 825),
+    'epd_5_in_83_colour': (600, 448),
+    'epd_12_in_48_colour': (1304, 984),
+    'epd_4_in_2_colour': (400, 300),
+    'epd_7_in_5_v2': (800, 480),
+    'epd_12_in_48_colour_V2': (1304, 984),
+    'epd_7_in_5': (640, 384),
+    'epd5in83b_V2': (648, 480),
+    'epd_7_in_5_v3': (880, 528),
+    '10_in_3': (1872, 1404),
+    'epd_7_in_5_v2_colour': (800, 480),
+    'epd_4_in_2': (400, 300),
+    '7_in_8': (1872, 1404),
+    'epd_7_in_5_v3_colour': (880, 528),
+    'epd_5_in_83': (600, 448)
+}