Update README with badges and docs link

Author: jturner314

README.md

@@ -2,12 +2,16 @@
 
 [![Build status](https://travis-ci.org/jturner314/ndarray-stats.svg?branch=master)](https://travis-ci.org/jturner314/ndarray-stats)
 [![Coverage](https://codecov.io/gh/jturner314/ndarray-stats/branch/master/graph/badge.svg)](https://codecov.io/gh/jturner314/ndarray-stats)
+[![Dependencies status](https://deps.rs/repo/github/jturner314/ndarray-stats/status.svg)](https://deps.rs/repo/github/jturner314/ndarray-stats)
+[![Crate](https://img.shields.io/crates/v/ndarray-stats.svg)](https://crates.io/crates/ndarray-stats)
+[![Documentation](https://docs.rs/ndarray-stats/badge.svg)](https://docs.rs/ndarray-stats)
 
-This crate provides statistical methods for [`ndarray`]'s `ArrayBase` type.
+This crate provides statistical methods for [`ndarray`]'s `ArrayBase` type. See
+the [documentation](https://docs.rs/ndarray-stats) for more information.
 
 [`ndarray`]: https://github.com/bluss/ndarray
 
-Only some statistical functions are implemented. Please feel free to contribute
+Only some statistical routines are implemented. Please feel free to contribute
 new functionality!
 
 ## Using with Cargo