Improve speed of read by restructuring.

[IsakNaslundBh]

Description:

A restructuring of the BarRead method, changed to first reading out Bars, assigning dummy objects to all properties with set Ids, and then extracting only the obejcts required (for example Nodes and Sections) can have a significant speed increase when reading elements from larger models. Especially relevant when extracting Bars from a Meshed model.

Can also be applied to read of other methods, for example Nodes, Loads and Panels.