add more docs and Cargo meta tags

Cargo.toml

@@ -9,6 +9,8 @@ repository = "https://gitlab.bitsmart.ltd/open/prongs.git"
 documentation = "https://doc.bitsmart.ltd/prongs"
 homepage = "https://gitlab.bitsmart.ltd/open/prongs"
 description = "Input handling schema written in rust. Backend agnostic, provides serializability, assignment and unified interface for working with inputs. Keyboard, mouse and controllers supported."
+categories = ["game-engines", "config"]
+keywords = ["input", "controller", "keyboard", "controls", "game"]
 
 [dependencies]
 bitflags = "1.0.4"

src/lib.rs

@@ -1,3 +1,9 @@
+//! Input handling schema written in rust. Backend agnostic, provides serializability, assignment and unified interface for working with inputs. Keyboard, mouse and controllers supported.
+//!
+//! Current backends include Piston and Gilrs with more on the way.
+//!
+//! **NOTE** prongs requires rust 1.32 or later
+
 use serde::{Deserialize, Serialize};
 use std::collections::HashMap;