Added text diff utilities

src/lib.rs

@@ -1 +1,25 @@
+//! This crate implements diffing utilities.  It attempts to provide an abstraction
+//! interface over different types of diffing algorithms.
+//!
+//! # Example
+//!
+//! ```rust
+//! use similar::{text::diff_lines, algorithms::Algorithm};
+//! let old = "Hello World!\nMore stuff here.";
+//! let new = "Oh well World!\nMore stuff here.";
+//! for op in diff_lines(Algorithm::Myers, old, new) {
+//!     println!("{}", op);
+//! }
+//! ```
+//!
+//! # Components
+//!
+//! The crate is split into two components:
+//!
+//! * [`algorithms`]: This implements the different types of diffing algorithms.
+//!   It provides both low level access to the algorithms with the minimal
+//!   trait bounds necessary, as well as a generic interface.
+//! * [`text`]: This extends the general diffing functionality to text (and more
+//!   specifically line) based diff operations.
 pub mod algorithms;
+pub mod text;