Betty 0.3.0b13

What's Changed

• Remove entity comparisons as they are unreliable by @bartfeenstra in #1241
• Reduce the amount of image size variations by @bartfeenstra in #1243
• Remove Pickleable by @bartfeenstra in #1242
• Make all shutil calls asynchronous by @bartfeenstra in #1245
• Use aiofiles.open() instead of open() by @bartfeenstra in #1244
• Use aiofiles.os by @bartfeenstra in #1247
• Remove debugging code comments by @bartfeenstra in #1248
• Support third-party entity types by @bartfeenstra in #1224

Full Changelog: 0.3.0b12...0.3.0b13