added 'jobs' built-in'
added 'cd' built-in
updated dsh.c
fixed job_list, new feature of jobs printing jobs as a job
merged conflict: add job to job_list on spawn
merge
io directives done
merged 2 versions
readme update
Merge branch 'master' of https://github.com/HelenaWu/dsh
enable one pipe, to attempt 2 pipes
fix cd
pipeline problems
pipe likely fixed, status still buggy (will suspend entire dsh if call cat after a completed pipeline)
automagical .c implemented, some waitpid and logging fixed but still in progress