I am using the debian wheezy to develop the android porting ,so I can not use the ppa to install the linaro-image-tools . I am going to get the linaro-image-tools source .Now , I find two ways ： one is “bzr branch lp:linaro-image-tools ” and the other is on the web http://git.linaro.org/infrastructure/linaro-image-tools.git . what is the difference between the two ?