Release 4

• If the user has not explicitly defined a serial port, we now default to use the first USB serial port found on the machine (but not COM1). (Thanks to Chris VE3RWJ)
• Other logging cleanups to cut down on clutter
• Removed the numpy work-around since Windows 10 has cleaned up the fmod error.

Version 3

• Major rework of calibration process.
• Cleaned up some of the noise on the console window at startup.
• Automatically stripping spaces from serial port entry on administration tab.
• If a single number is entered into the serial port box, automatically add the "com" prefix.
• Fixed problem with complex impedance. Now showing real and imaginary components.
• Using locally-compiled PyInstaller bootloader to avoid issues with Windows Threat Detection.