Days Counter 1.0.0.1

• first version of 'Days Counter'
• counts the days between two dates or from a specific date an a day span

What's Changed

• Create README.md by @mjohne in #1
• Create README.md by @mjohne in #2
• Add files via upload by @mjohne in #3
• Add files via upload by @mjohne in #4
• Add files via upload by @mjohne in #5

Full Changelog: https://github.com/Mijo-Software/Days-Counter/commits/1.0.0.1