get_balance.py creates an unnecessary directory

[garrul4ik]

When requesting a balance using the script from the example "get_balance.py" , the library creates an "images" folder. I hate deleting it every time :))

[Badim41]

You can specify a different folder name:

client = NetworkToolsAPI(api_key, output_dir=".images")

OR remove 61 line in network_tools/api.py

This folder is needed for images, music, and text-to-speech when accessing the API