Update CMakeLists.txt to Link to Indigo

This is a very simple change that fixes the CMakeLists.txt file link to
point to the indigo version of ROS, instead of hydro.  The main goal of
this pull request is to test the process for future changes.

Merge with "islamelnabarawy:master"

Author: Islam Elnabarawy <ie3md@mst.edu>
Remove Phone GPS

The phone gps node was unnecessary since it is handled through a ros
node.  This commit removes the unnecessary node in an attempt to clean
up the repository.

Author: Matt Anderson <mia2n4@mst.edu>
Fix Build Issue

It seems like the issue that was plagueing some people when building
had to do with the custom messages not building before the actual
code.  Adding an s to
add_dependencies(Estop mst_estop_generate_messages_cpp).

Author: Matt Anderson <mia2n4@mst.edu>
Fix Ros Master Address

At competition it was necessary to change the roscore master address to
be able to use it with the phone for magnetometer information.  This
address has been changed back to local host which will allow the
computing division to run this launch file.

Author: Matt Anderson <mia2n4@mst.edu>
Merge branch 'master' of https://github.com/MST-Robotics/Enterprise_IGVC
Added OpenCV Link

Previously opencv was not linked properly in the cmakelist in colorstat
this has been changed so that the libraries are now included.

Author: Matt Anderson <mia2n4@mst.edu>