moved mpu code to seperate file. I am also committing the TODO file for the first time, it is missing some entries.

refactored timermanager types, but also a general refactor of the codebase, things should look a bit cleaner now

Wrote macros for mux pad configuration, mainly so code will be easier to clean up/refactor, and also wrote some other various macros

irq callbacks not working, need to investigate tomorrow, might have misread the ref. specification regarding the hardware architecture, reread tomorrow

more on timers, should start testing soon to reveal any problem, before it's fully implemented so it can be remedied in good time. Will continue tomorrow and will likely start testing then, have made some headway today