receive xhci events

fix issue #1: ELF files not loaded correctly

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

print basic XHCI information

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

rewrite general IO using an IO-manager

add system call to look up the names of functions

add basic stack tracing ability

rename service proivder to service function ...

now matches the documentation in the wiki

add kernel events ...

kernel events get triggered by the kernel when certain things happen.
first example: log a message whenever a new programm is loaded from the initrd

add an additional argument to request calls

add system call to request memory ...

print hi to vga screen

use string identifiers for events ...

(some rework of the string saving system was required)

use stringmap for communication between processes

use saved strings for service interaction system calls

mov syscall handlers to different files

add a static libary and fix interrupts

enable subscribing to an interrupt and set up the PIC

end tasks when they trigger an exception

enable interrupts

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

organize services and their providers

enter usermode for user processes and start with some memory protection