Added test code for creating a gl::Texture from constructor
Added test code for creating a gl::Texture from constructor

sosolimited/Cinder,sosolimited/Cinder,2666hz/Cinder,morbozoo/sonyHeadphones,2666hz/Cinder,sosolimited/Cinder,morbozoo/sonyHeadphones,morbozoo/sonyHeadphones,2666hz/Cinder,2666hz/Cinder,morbozoo/sonyHeadphones,sosolimited/Cinder