revised default copy constructor and = for ofTexture.  closes #22
revised default copy constructor and = for ofTexture.  closes #22

HellicarAndLewis/ProjectDonk,HellicarAndLewis/ProjectDonk,HellicarAndLewis/ProjectDonk,HellicarAndLewis/ProjectDonk,HellicarAndLewis/ProjectDonk,HellicarAndLewis/ProjectDonk