[testing] more restructuring, almost ready to ship, added some tests for testing with travis
[testing] more restructuring, almost ready to ship, added some tests for testing with travis

avehtari/GPy,befelix/GPy,mikecroucher/GPy,dhhjx880713/GPy,SheffieldML/GPy,avehtari/GPy,befelix/GPy,ysekky/GPy,SheffieldML/GPy,ysekky/GPy,esiivola/GPYgradients,ysekky/GPy,esiivola/GPYgradients,mikecroucher/GPy,ysekky/GPy,dhhjx880713/GPy,esiivola/GPYgradients,avehtari/GPy,avehtari/GPy,mikecroucher/GPy,SheffieldML/GPy,befelix/GPy,SheffieldML/GPy,dhhjx880713/GPy,dhhjx880713/GPy,esiivola/GPYgradients,befelix/GPy,mikecroucher/GPy