can now handle ^C signal
prompt now displays current working directory
now searches avaliable paths of command
can now use the cd command to change directories
updated README.md
fixed memory leak and fixed how the PATH is parsed and tested
can now handle absolute paths as commands
fixed error checking in ls.cpp and commands containg only spaces no longer break hw0.cp
updated hw0.cpp and updated README.md with PATH bug
added ./ bug to README.md
fixed bugs pretaining to path commands and updated README.md
updated README.md and hw0.cpp and added signals test script
updated README.md