refactor syscall.c

add system call to retrieve the physical location of a virutal address

move 'gets'-functionality to ioManager to simplify the shell source code

add await syscall

check if a message should be printed to the main vga screen by checking if any syscall in the 'syscall stack' is the foreground process

add system call to look up the names of functions

fix interrupts occuring while in user mode

rename service proivder to service function ...

now matches the documentation in the wiki

free stack of unused system call processes ...

saves about 1/2 of previously used memory

add system call to request memory ...

print hi to vga screen

add discard string system call

add read string syscall

add stringmap insert and read length functions

mov syscall handlers to different files

seperate log into log file and a parallel driver

add events

add a static libary and fix interrupts

minor code cleanup regarding loading ELF files and running the main function

enable subscribing to an interrupt and set up the PIC

end tasks when they trigger an exception

enable freeing of memory

add passing data to a syscall

use registers for passing data to system calls

add the ability to create multiple services and repair inter-service communication

add port IO syscalls

clean up syscall code

add basic cross-calling of service providers

organize services and their providers

enter usermode for user processes and start with some memory protection