Added a brief description of the project in form of docstrings at the crate level

reCTBN/src/lib.rs

@@ -1,3 +1,9 @@
+//! # reCTBN
+//!
+//! > **Note:** At the moment it's in pre-alpha state. 🧪⚗️💥
+//!
+//! `reCTBN` is a Continuous Time Bayesian Networks Library written in Rust. 🦀
+
 #![allow(non_snake_case)]
 #[cfg(test)]
 extern crate approx;