A confusing dialog pops up when adding a new endpoint for a function project

[v-ruizh]

OS: Windows
Build Version: 0.1.0-alpha

Repro Steps:

1. Create a JavaScript project with HttpTrigger function using Functions extension.
2. Open this project in VS Code.
3. Click the 'Create Endpoint...' button and provide an endpoint name.

Expect:
Succeed to create the endpoint for the function project.

Actual:
A confusing dialog "The selected folder is not a function project. Create new project?" pops up.

[nturinski]

This error is happening because the Functions project is automatically created in an "api" folder rather than the root of your project.

With this #54, the dialog will no longer come up and it will just create the project in an "api" folder. I think that this issue should be considered fixed after merging.