Allocate big data structures of the scheduler dynamically

[OlliV]

Large data structures like task_table should be allocated dynamically either with kmalloc or maybe preferably with dynmem since we may want to make these quite big for any real use.

[OlliV]

It might be actually impossible because for example stack frame must be readable and writable when master page table is already changed. Instead parts of it could be possible to move. Another option could be copy the TCB of an active thread to some static location and copy it back to the dynamic location when scheduler is executed.

[OlliV]

Now developing an alternative scheduler.