fix(README): Added README badges

Author: lyndseybrowning

README.md

@@ -1,5 +1,10 @@
 # Node Boggle Solver
 
+[![Travis Build](https://img.shields.io/travis/lyndseybrowning/node-boggle-solver.svg?style=flat-square)](https://travis-ci.org/lyndseybrowning/node-boggle-solver)
+[![codecov coverage](https://img.shields.io/codecov/c/github/lyndseybrowning/node-boggle-solver.svg?style=flat-square)](https://codecov.io/github/lyndseybrowning/node-boggle-solver)
+[![downloads](https://img.shields.io/npm/dm/node-boggle-solver.svg?style=flat-square)](http://npm-stat.com/charts.html?package=node-boggle-solver&from=2015-08-01)
+[![MIT License](https://img.shields.io/npm/l/node-boggle-solver.svg?style=flat-square)](http://opensource.org/licenses/MIT)
+
 [Boggle](https://en.wikipedia.org/wiki/Boggle) is a game in which players try to find as many words as possible in a 4x4 grid of letters.
 
 This solver is built with JavaScript using a [Trie](https://en.wikipedia.org/wiki/Trie) for dictionary storage.