Updated README.md & changed name of tool

[AuburnMedia]

Updated some stuff in the README just to be sure

Updated all the alt texts on the screenshots (it was in Japanese for some reason?)

And finally, changed the name of the JSON <> Yaml converter to JSON <> YAML converter. This was just a mass find and replace function, so if there are any problems let me know. I had trouble building the scripts so this hasn't been tested. It's also worth noting that the screenshot on README.md for this tool will need to be changed. Again, I wasn't able to do this.