Add links to docs.rs in readme and cargo.toml (#1)

Author: JeffBelgum

Cargo.toml

@@ -5,6 +5,7 @@ description = "An in-process scheduler for periodic jobs. Schedule lets you run
 authors = ["Ryan Leckey <[email protected]>"]
 homepage = "https://github.com/mehcode/schedule-rs"
 repository = "https://github.com/mehcode/schedule-rs"
+documentation = "https://docs.rs/schedule"
 readme = "README.md"
 license = "MIT/Apache-2.0"
 keywords = ["schedule", "cron", "job", "periodic"]

README.md

@@ -1,6 +1,8 @@
 # schedule-rs
 > An in-process scheduler for periodic jobs. Schedule lets you run Rust functions on a cron-like schedule.
 
+[Documentation](https://docs.rs/schedule)
+
 ## Install
 
 ```toml