Plotter cleanup

[akaszynski]

This PR makes a few changes to ansys.dpf.core.plotter.Plotter. Some keyword arguments were added, along with some performance improvements when mapping an individual field to the global data array.

Previously, we had:

i = 0
scop_ids = field.scoping.ids
while i < size:
    ind = m_id_to_index[scop_ids[i]]
    overall_data[ind] = data[i]
   i += 1

This works quite well since python dictionaries (m_id_to_index) are quite fast. However, we can do a bit better by implementing a map and get, since those are implemented in C. Locally, this results in a 3x speedup in this section of code, which can be quite significant considering that it takes around ~60 ms prior to optimization for a 70k node model. For a 1M node model, estimated time savings for this method is around 570 ms.

New implementation is:

ind = list(map(m_id_to_index.get, field.scoping.ids))
overall_data[ind] = field.data