coreutils-rs 0.2.0

# GNU Coreutils package implementation with Rust

The GNU Core Utilities or coreutils is a package of GNU software 
containing implementations for many of the basic tools, such as
`cat`, `ls`, and `rm`, which are used on Unix-like operating systems.

Project aims for implementing coreutils' functionalities with Rust purely for 
learning purposes.


## Status

### Ready
- grep
- cp
- mv
- ls
- head

## Log
- v0.1.0
  - command line argument parsing based on Rust standard library
  - ready to use are: grep, cp, mv, ls, head
- v0.2.0
  - command line argument parsing based on Clap library