Add docs

src/lib.rs

@@ -1,3 +1,17 @@
+//! This crate contains the gclone and pgd commands.
+//!
+//! The `gclone` command automatically clones a git repository and puts it in the right place.
+//! The `pgd` command manages a cache for efficiently being able to print a directory corresponding
+//! to a repo or an owner. You can then add the following to automatically `cd` to a directory:
+//! ``` zsh
+//! cdg() {
+//!     local newdir
+//!     newdir=$(pgd $1) && cd $newdir
+//! }
+//! ```
+
+#![warn(missing_docs)]
+
 use std::{env, fmt, error, result};
 use std::process::exit;
 use std::io;