Remove the necessity of specify EDA (class code model)

[hildogjr]

Remove the necessity of specify EDA (kicad, CSV, ...), also remove this option list from the GUI (or make a list of the opened files, instead the actual combox, to allow that each file interpreter). Each eda/eda_*.py already have a description with ['file']['extension'] and ['file']['content'] regular expression match.

Maybe is a good idea to use the Python Script on KiCad for read this, inheriting on our class (that will define file extension and content for match).

The code workflow should be:

1. Open the file;
2. Check if KiCad, CSV or Altium module match;
3. Read all the fieds;
4. Close the file;
5. Just them remove the undesired fields and merge fields. This will allow a better flux control process and also show NOT-POPULATED parts in some list, if desidered.

The --eda should be keep to force the open method.