Add travis-ci badge to the README.md

Author: dmitry-korolev

README.md

@@ -1,4 +1,6 @@
 # Tinkoff Utils
+[![Build Status](https://travis-ci.org/TinkoffCreditSystems/utils.js.svg?branch=master)](https://travis-ci.org/TinkoffCreditSystems/utils.js)
+
 JavaScript utility library with the primary task to simplify work with data, functions, promises, and more.
 The main goals of the library are modularity, functional style, performance, and simplicity. 
 
@@ -65,4 +67,4 @@ Bubdle size is compared to each other with the assumption that we need only a sm
 | import ... from 'ramda/src/...' | 10 kb |
 | import ... from '@tinkoff/utils/...' | 2.32 kb |
 
-The detailed comparison with specific library see [COMPARE.md](./COMPARE.md)
+The detailed comparison with specific library see [COMPARE.md](./COMPARE.md)