RotaryScale constructor changes + new imgs

[AokiAhishatsu]

• Added RotaryScale options
• Added volt and bar background images for RotaryScale

[slightlynybbled]

Thank you so much! I love it! My only question is that I would like to understand the implication for adding unit=' u'. I believe that this results in outputs that will - by default - say 21.04 u instead of simply 21.04, correct? I didn't see any other changes related to this.

[AokiAhishatsu]

Yes, I my intention was to display a default unit with one space in front.

[AokiAhishatsu]

And btw, I use img_data to read images from base64 strings. This is very useful when you want create single file executables with pyInstaller.

[slightlynybbled]

I was about to merge your pull request, but I am very intrigued by your img_data comment. Could you elaborate?

[AokiAhishatsu]

You can save an image in a string. You can generate the string with this:

import base64

with open("\some\path\and\file.py", "rb") as image_file:
	encoded_string = base64.b64encode(image_file.read())

print(encoded_string)

And call the constructor with the string.

[slightlynybbled]

Would you be opposed to removing the unit = u? In the circles I travel in, this often means micro as in microseconds. Other than that, I'm quite happy. Your pull request will then be merged and released to v0.2.5 on pypi.

I will take the image string advice. I have already had issues with images and pyinstaller, so this will help on multiple fronts. That will probably be the next release up, v0.3.x since it is a bit more comprehensive.

[AokiAhishatsu]

I don't care about the u