add travis icon <3

Author: KlonD90

README.md

@@ -1,4 +1,7 @@
 # node-tarantool-driver
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+[![Build Status](https://travis-ci.org/KlonD90/node-tarantool-driver.svg)](https://travis-ci.org/KlonD90/node-tarantool-driver)
+
 Node tarantool driver for 1.6 support Node.js v.0.12+ and IO.js.
 
 Based on https://github.com/mialinx/go-tarantool-1.6 and implements http://tarantool.org/doc/dev_guide/box-protocol.html, for more information you can read them or basic documentation at http://tarantool.org/doc/.