DSSCompatFlags: Add missing flags, added in 0.14.x

Prepare for DSS C-API 0.14.3.

Match API to DSS-Python 0.15.2: updated comments, added new functions…

… and enums.

Updates for v0.13.4

Updates for v0.13.3

- Use DSS C-API 0.13.3
- Add DSSCompatFlags.SaveCalcVoltageBases
- Port the comment about WdgCurrents/Voltages and open terminals

Prepare version 0.13.2 and update CI config.

Updates for DSS C-API 0.13.1, includes basic sample

- README.md: tweaks and pt-BR version.
- csproj: Add README.md as PackageReadmeFile, add licenses
- examples: add sample WinForms app and some notes, images
- add a dss_sharp.targets for copying native DLLs when building framework projects

Merge pull request #11 from dss-extensions/ctx

Extensive updates to support multiple DSS instances, GR API, exception mapping and more!

Fix a double pointer issue (ref is not needed when passing arrays), f…

…ix "get_CktElements(string fullName)"