adds build of gz_msgs on end-user computer
This means we don't need to provide different zips for different
versions of ubuntu.
The problem was that gazebo on 14.04 comes with protobuf 2.5 but gazebo on 15.10 comes with 2.6
added a few other fixes to the install script as well
also fix dependency between simluation publishing and libwpilibcsim
building
Change-Id: I57d5a26ed7795bc61a25402e2986c6023d1d78ac
To publish the simulation zip, run ./gradlew publish -PmakeSim
Targeting Ubuntu 14.04 and 15.10 for now, with 14.04 being the
currently best supported.
Two scripts have been drafted for installing, for 14.04 and 15.10
It currently publishes to ~/releases/maven/development/simulation
There is a known bug that gz_msgs for 15.10 must be built using
protobuf 2.6, which is not the default on 14.04.
Change-Id: I6cccd601671553d30fd05bbbc79c2b7dc1efbf1d
