Express Template Modernization

[mjbvz]

This tracks work to modernize the Express Templates included in NTVS. The following templates are targeted:

• AzureExpress4App
• Express4App
• TypeScriptAzureExpressApp
• TypeScriptExpressApp

Planned work consists of the following:

• Update package.json versions. Switch to using ^ for version numbers where possible so we don't default users in old versions unexpectedly
• Update Jade to pug Switch Jade to Pug #895
• Switch styl to plain old css. The templates should make few assumptions about intended use and styl is not even one of the more popular style sheet languages. And a new user is more likely to have experience with css. And we do not provide any syntax highlighting or real assistance for editing styl files, but web tools does provide this for css files.
• Update TypeScript express projects to Express 4.

Please let me know if you have any suggestions or feedback on this plan.

[mjbvz]

All templates should be updated now. You can try the JavaScript templates out in the latest devbuild. The TypeScript template changes will get picked up by the next devbuild