Fix windows build path

Only set PyDB as the global debugger after it's initialized. Fixes #1688

 (#1690)

Fix parsing "host" and "post" in "attach" request.

Different implementation to set tracing to other threads for Python 3…

….7. Fixes #1587 (#1669)

Update contributing instructions

Fix for breakpoint binding issue in VS (#1601)

* Fix for breakpoint binding issue in VS

* Fix tests

Don't trace <string> files unless it's the one from python -c. Fixes #…

…1398

 Move more code to pydevd (#1519)

* Add systeminfo to pydevd

* Move more code to pydevd

* Address comments.

Ensure stop_on_entry is unset after first break. Fixes #1456 (#1457)

* Ensure stop_on_entry is unset after first break

* Update tests

Remove ptvsd.debugger.run()