Halftone 0.3.0

Halftone 0.3.0 brings up controls for brightness and contrast, button for opening preview image in external image viewers and a slightly revised look to the app.

Screenshots:

What's Changed

• Update link to Upscaler repo by @paulenit in #7
• Add Turkish Translation by @sabriunal in #6
• Added Russian translation by @daudix-UFO in #15
• Added Dutch translation by @Vistaus in #14
• Create it.po by @albanobattistella in #16
• Update it.po by @albanobattistella in #18
• Add brightness and contrast controls by @tfuxu in #19
• Use different icon for image resolution and use flat buttons by @daudix-UFO in #20

New Contributors

• @paulenit made their first contribution in #7
• @sabriunal made their first contribution in #6
• @Vistaus made their first contribution in #14
• @albanobattistella made their first contribution in #16

Full Changelog: 0.2.1...0.3.0