fixed build image in README.md to link to Travis CI page

README.md

@@ -1,6 +1,6 @@
 citra emulator
 ==============
-![Travis CI Build Status](https://travis-ci.org/bunnei/citra.svg)
+[![Travis CI Build Status](https://travis-ci.org/bunnei/citra.svg)](https://travis-ci.org/bunnei/citra)
 
 An experimental open-source Nintendo 3DS emulator/debugger written in C++. At this time, it only emulates a very small subset of 3DS hardware, and therefore is only useful for booting/debugging very simple homebrew demos. Citra is licensed under the GPLv2. Refer to the license.txt file included.