Added skeleton of ls.cpp
Added parsing for -alR flags
Added support for -a and -l flags
Added support for total blocks
Added -R and perror statements
Added file parameters
Fixed output formatting
Added colors
Added ls to Makefile
Updated README, fixed perror
Removed case sensitivity
Added ls test script
Spacing
Fixed output
Solved merge conflict between ls and master branches
Merge branch 'master' of https://github.com/abarb014/rshell