============================= TODO =============================
[] '<<' functionality
[] '{}' functionality
[] '()' functionality
[] ^C
[] ^Z
[] Bg-procs proper handling

============================= DONE =============================
[x] Show current directory in the prompt
[x] Waiting of fg-procs while bg-procs are running
 \_  changed wait() to waitpid()
[x] Ability to change current directory
[x] 'cd' without params to home directory
