Move some of the more complex classes into their own include files.

[Short-bus]

Simplify the main source code, and improve the integrity of some of the more complicated classes by separating them out into their own include files. Possibilities are

• metcheck_handler
• image handling
• image viewing
• file dialog
• timer
• disc monitor
• oscommand functionality
• memory monitor
• log file handling
• cpu monitor

[Short-bus]

pilomarlogfile.py: provides logfile() class. pilomartimer.py: provides timer() class. pilomarmetcheck.py: provides metcheck_handler() class. pilomarimage.py: provides pilomarimage() class. pilomarviewer.py: provides pilomarviewer() class (development/debugging/tuning utility) pilomardialog.py: provides filedialog() and folderdialog() classes. pilomardisc.py: provides discmonitor() class. pilomarcpu.py: provides cpumonitor() class. pilomarmemory.py: provides memorymonitor() class. pilomaroscommand.py: provides oscommand() class.

[Short-bus]

Summer2023 development merge has included this and also removed some unwanted modules.