Modify order of base parameters in UI
Add method to update miscellaneous parameters

Modify `update_params()` method to update some other parameter values.
Move update of geometric and dynamic parameters to separate private
method - `_update_dyns_geos()`.
Add `_update_misc()` method to do the actual update of miscellaneous
parameter values.
Add `stiffness` attribute to `FloatingRobot` class.
--All changes in `FloatingRobot` class--
Remove `pysymoro/manipulator.py`