MLECO-2082: Adding visual wake word use case
MLECO-2083: Refactoring img_class and visual wake word

*Added source files for visual wake word
*Added tests
*Added docs
*Added new images for visual wake word demo
*Refactored common functions in img_class, visual wake word and other usecases

Change-Id: Ibd25854e19a5517f940a8d3086a5d4835fab89e9
Signed-off-by: Éanna Ó Catháin <eanna.ocathain@arm.com>
diff --git a/set_up_default_resources.py b/set_up_default_resources.py
index f8d7f8c..219cb3c 100755
--- a/set_up_default_resources.py
+++ b/set_up_default_resources.py
@@ -61,6 +61,15 @@
                       {"name": "ofm0.npy",
                        "url": "https://github.com/ARM-software/ML-zoo/raw/68b5fbc77ed28e67b2efc915997ea4477c1d9d5b/models/keyword_spotting/ds_cnn_large/tflite_clustered_int8/testing_output/Identity/0.npy"}]
     },
+     {
+        "use_case_name": "vww",
+        "resources": [{"name": "vww4_128_128_INT8.tflite",
+                       "url": "https://github.com/ARM-software/ML-zoo/raw/7dd3b16bb84007daf88be8648983c07f3eb21140/models/visual_wake_words/micronet_vww4/tflite_int8/vww4_128_128_INT8.tflite"},
+                      {"name": "ifm0.npy",
+                       "url": "https://github.com/ARM-software/ML-zoo/raw/7dd3b16bb84007daf88be8648983c07f3eb21140/models/visual_wake_words/micronet_vww4/tflite_int8/testing_input/input/0.npy"},
+                      {"name": "ofm0.npy",
+                       "url": "https://github.com/ARM-software/ML-zoo/raw/7dd3b16bb84007daf88be8648983c07f3eb21140/models/visual_wake_words/micronet_vww4/tflite_int8/testing_output/Identity/0.npy"}]
+    },
     {
         "use_case_name": "kws_asr",
         "resources": [{"name": "wav2letter_pruned_int8.tflite",