environment tweaks
Revert "revert color change in flat terrain"

This reverts commit eb7f14bc375337a9e050e30c0de5e219111556c6.
WIP: fix cost function
WIP: fewer SDP constraints
fewer unnecessary variables and constraints, and handle mosek stall better
cleanup and fix some numerical scaling issues
support color in rigidbody flat terrain
support getting just the mass of a single robotnum
just get the mass of the quadrotor
blue terrain and faster execution
method to set geometry color
clean up a bit
cleanup
cleanup
display progress
add a single manual region seed to make the example more reliable
comment
Merge pull request #574 from rdeits/icra-2015-uav-demo-rebase

Improvements for the mixed-integer UAV demos