Add progress bar visuals to tests.

naive-nlu/tree_nlu/utils/visuals.py

@@ -0,0 +1,15 @@
+def show_progbar(done, total, msg=''):
+    total_blocks = 10
+    blocks_done = (done * total_blocks) // total
+    blocks_to_go = total_blocks - blocks_done
+
+    print('\r\x1b[K'  # Go to the start of the line
+          '\x1b[0m'   # Restart the "style"
+          '|'  # Put the first "|"
+          + blocks_done  * '█' # Completed blocks
+          + blocks_to_go * ' ' # Uncompleted blocks
+          + '\x1b[7m|\x1b[0m'  # End the bar
+          + ' '
+          + msg  # Add message
+          + '\r' # Go back to the start
+          , end='')