Changes to enable dev host to launch.

[rkeithhill]

The changes are mainly to launch.json. The change to package.json is simply to reorder the scripts in the order they appear when you create a brand new extension. Yeah, a little OCD on my part.

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This change is

[rkeithhill]

BTW there is a task in tasks.json called install but no corresponding script in package.json. There is a postinstall script. Should the tasks.json task be changed to postinstall?

[daviwil]

Awesome! I haven't used that tasks.json file in a really long time so I forgot it was there :) Not sure about the install task, I think I grabbed this file from the VS Code team a long time ago so I don't even remember why it's there. We can take it out if you like.

[rkeithhill]

In this case, maybe I'll just copy over the default tasks.json I got with the new extension I created with yo code. Let me do that tonight and push the change. I just wanted to make sure you weren't using the install task somehow.

[rkeithhill]

Ah, the install task essentially runs npm install which populates the node_modules folder. OK, I think this PR is good to go then.