added README

README.md

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+# Output-VT100
+
+This simple crates allows developers to enable ANSI escape characters in Windows' console, be it CMD or PowerShell. Its usage is very simple, as shown below:
+
+```rust
+extern crate output_vt100;
+
+fn main() {
+    output_vt100::init();
+    println!("\x1b[31mThis text is red!\x1b[0m");
+}
+```
+
+If you wish to ensure the `output_vt100::init()` function is only ran once, you can use the crate [ctor](https://crates.io/crates/ctor). Be aware though it might not be suited for every use case, as explained on the crate’s presentation.
+
+```
+extern crate output_vt100;
+extern crate ctor;
+use ctor::*;
+
+#[ctor]
+fn init_term() {
+    output_vt100::init();
+}
+
+fn main() {
+    println!("\x1b[31mThis text is red!\x1b[0m");
+}
+```
+
+# Acknowledgements
+
+A big thank you to [nbouteme](https://github.com/nbouteme) who helped me a lot during the development of this create.