archive_append finished and debugged
add_members implemented
remove unneeded printf's (debugging)
add_all implemented
BUG: not working quite right, gibberish in spots
Added a file_data arg to read_archive (char array) to allow passing back of file data
Mostly implemented extract
repacked file name parsing into get_member_files
add code to call get_member_files before each option using it
Fixed bug with get_member_files structure
fixed incorrect strcmp in extract_members
fixed segfault by declaring large data arrays as static

extract is now creating files correctly but still need to
  - set permissions, uid, gid, atime, mtime