add travis badge

Author: szagoruyko

README.md

@@ -1,5 +1,6 @@
 OpenCV bindings for LuaJIT+Torch
 =====================
+[![Build Status](https://travis-ci.org/VisionLabs/torch-opencv.svg?branch=master)](https://travis-ci.org/VisionLabs/torch-opencv)
 
 Installation:
 
@@ -11,4 +12,4 @@ For complete info on the project, including tutorials and contribution guideline
 
 See [this page](https://github.com/VisionLabs/torch-opencv/wiki/Installation) for a quickstart.
 
-**Should you find a bug, please get in touch and raise an [issue](https://github.com/VisionLabs/torch-opencv/issues) so that we can help resolve it!**
+**Should you find a bug, please get in touch and raise an [issue](https://github.com/VisionLabs/torch-opencv/issues) so that we can help resolve it!**