New python scripts.

src/CMakeLists.txt

src/dynamic_graph/sot/core/meta_task_posture.py

src/dynamic_graph/sot/core/meta_task_visual_point.py

src/dynamic_graph/sot/core/utils/__init__.py

src/dynamic_graph/sot/core/utils/attime.py

src/dynamic_graph/sot/core/utils/history.py

...dynamic_graph/sot/core/utils/thread_interruptible_loop.py

src/dynamic_graph/sot/core/utils/viewer_helper.py

src/dynamic_graph/sot/core/utils/viewer_loger.py