Travis fix again

cmake/travis_script_linux.sh

 
 git clone https://github.com/hpicgs/glbinding.git
 cd glbinding
-cmake .
+mkdir build
+cd build
+cmake ..
 make -j4
 sudo make install
 cd ..
+cd ..
 
 mkdir build && cd build && cmake .. && make -j 4 && make check
 

src/system/Shader.cpp

     }
 
     shader.use();
-    shader.loadUniform(0, Window::getSize());
+    shader.loadUniform(0, glm::vec2(Window::getSize()));
     shader.loadUniform(1, texture, store);
     shader.loadUniform(2, color);
     vertices.bindBuffer(0, 2);