Pelvis bug fixed

The pelvis bug should be fixed, it was introduced by the time consistency loss, which is anyway not needed as the vert_loss constrain well enough the SKEL fit, and bad global orientation initialization.

Here are some current fit examples for different SMPL pose datasets. They were generated with the current version of examples/align_to_SMPL_seq.py

CMU 05_04

CMU_05_04.mp4

MOYO Feathered_Peacock_Pose

moyo_feathered_peacock.mp4

DFaust 50002_chicken_wings

Dfaust50002_chicken_wings.mp4

MPI_Limits/03099/op5_poses

PI_Limits_03099_op5.mp4