Renamed torques to make some sense
Renamed torque to torque_lab and torque_body. Still need to work on reading in torque_body and work on ext_torque (i.e., in which frame is it) also check frame for the statistics routine.
I made a fucking mess of the rotations
Worked on the torque and angular velocity/momentum. The omega put out by the observable routine is now given in the lab frame. The old variables torque and omega have been replaced with torque_body, torque_lab, omega_body, and omega_lab, to better make the distinction between the two frames (co-rotating and space-fixed), respectively. The scripts and testcases have been modified, and the documentation is updated to reflect the change.
Incorporated deprecated warning message and restored old espresso version functionality.
Merge branch 'master' into work_branch
Fixed minor compiler warning.
Merge commit '4289200' into angular_momentum
Renamed torque to torque_{lab,body}, improved troque handling in blockfiles.
  Clearer distinction between the reference frames for torque and angular momentum.