Add support for Buildtarget dotnetcore

[DatDucati]

error: Package PushBulletSharp 3.0.1 is not compatible with netcoreapp1.0 (.NETCoreApp,Version=v1.0). Package PushBulletSharp 3.0.1 supports: portable-net45+win8 (.NETPortable,Version=v0.0,Profile=Profile7)
error: One or more packages are incompatible with .NETCoreApp,Version=v1.0.

[Still34]

Seconded, unless the project is dead.

[adamyeager]

The project isn't dead, it's a one man project and I have a full time job. I haven't installed Core yet because I haven't had a need for it. I would have to look into what libraries are there and what is missing. The libraries I'm concerned about are around the encryption parts of PushbulletSharp. It was a long weekend to get encryption working under the current portable target.

I do see a lot of value in this project targeting Core. If I get a free day, I'll branch off and start converting. When I do, I'll update this thread with the branch name if you all are interested in testing it out.