VS Code January Release Adoption

This release refactors some code to use the new configurationDoneRequest and tell VS Code that we support hovering over properties. I hope this makes the adapter a bit more stable.
Also, sourceRequest has been implemented, I don't know how important this is for PHP, but if you are using eval() you can now probably stop at exceptions inside the inlined code.

This release requires the VS Code January release to be installed.