Caffe tagged version 1.0 incompatible with version of boost in Ubuntu 14.04 and ROS Indigo

[akgoins]

The Caffe Docker files are based from the Docker files provided in the Caffe repo. These Docker files specify to pull the 1.0 tagged version, however this version does not build properly in Ubuntu 14.04. This is fixed in the upstream master, so this Docker file has been modified to pull master in order to build properly. If we want to make the Docker file "static", we will need to find a tagged version of Caffe to pull which will build properly on Ubuntu 14.04 for the Indigo image.