Refactor branch: design changes to support os.fork

[karthiknadig]

No description provided.

[karthiknadig]

Extension version with support for the out-of-proc debug adapter.
ms-python-insiders.zip

{
    "name": "Terminal",
    "type": "python",
    "request": "launch",
    "program": "${file}",
    "console": "integratedTerminal",
    "ptvsd": "C:\\GIT\\ptvsd\\src\\ptvsd",
    "experiment": true
},

You will need this change to the launch json for it to work.

[int19h]

Initial research and design is complete, and we are going with the Right Thing approach over the minfix. This requires some pydevd changes, and also changes to the adapter to handle multiple debug servers, and allow multiple connections from the IDE. I'll create separate work items for these.