Initial release of Poor Fox

The application is fully functional in Linux, macOS and Windows. However, there are still many improvements to be made. In particular, it is necessary to:

• Make the syntax for logging expenses simpler so that the user can do it more quickly.
• Automatically recognize the date in which a user is logging expenses so that he does not have to enter it manually.
• Eliminate linear searching.
• Create different color schemes for Linux and macOS, which can use more than the 16 colors supported in Windows.
• Add a way to compare different reports.