Added tests and documentation

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "output_vt100"
-version = "0.1.0"
+version = "0.1.1"
 authors = ["Phuntsok Drak-pa <phundrak@phundrak.fr>"]
 edition = "2018"
 description = "Utility to activate escape codes in Windows' CMD and PowerShell"

src/lib.rs

@@ -1,3 +1,27 @@
+//! # Output-VT100
+//!
+//! When you write terminal-based crates, sometimes you might want to use the
+//! standard ANSI escaped characters, to display some colors, to display text
+//! as bold, italic or whatever. However, you’ve just discovered all your
+//! pretty displays that worked like a charm on Linux and Mac look terrible
+//! on Windows, because the escaped characters do not work. Rather, they are
+//! not activated by default. Then you discover you have to do system calls to
+//! Windows directly to activate them in order to get your beautiful text back.
+//! What a pain!
+//! And this is where this crate comes in action! Simply add it as a dependency
+//! for your own crate, and use it like this:
+//! ```rust
+//! extern crate output_vt100;
+//!
+//! fn main() {
+//!     output_vt100::init();
+//!     println!("\x1b[31mThis text is red!\x1b[0m");
+//! }
+//! ```
+//! And that’s it! By calling it once, you have now activated PowerShell’s and
+//! CMD’s support for ANSI’s escaped characters on your Windows builds! And
+//! you can leave this line in your Unix builds too, it will simply do nothing.
+
 #[cfg(windows)]
 pub fn init() {
     use winapi::shared::minwindef::DWORD;
@@ -18,3 +42,11 @@ pub fn init() {
 pub fn init() {
     ;
 }
+
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn activate_vt100() {
+        crate::init();
+    }
+}