Expose more loopback middleware for require

[raymondfeng]

/to @bajtos

We need a way to reference loopback.favicon and other middleware from middleware.json.

[bajtos]

This is IMHO rather silly. errorHandler is just an alias for require('errorhandler'). In your middleware.json, you can use errorhandler instead of loopback/error-handler.

[raymondfeng]

I'm fine to remove error-handler.

[bajtos]

IMO this is the last pull request related to middleware that we need to land before we can release a new minor version.

To speed things up, I am proposing the following:

• removeserver/middleware/error-handler.js
• keep server/middleware/favicon.js as it is now
• add serve-favicon to loopback dependencies
• land this patch and release v2.8.0

@ritch do you have any opinion on this PR?

[raymondfeng]

@bajtos, I'll make the changes based on your proposal. It won't conflict with the discussion at strongloop/loopback-boot#70.

[raymondfeng]

Done.

[bajtos]

Is there any reason for pinning down the minor version via ~, instead of supporting all minor versions via ^?

[bajtos]

One more comment, feel free to land the PR if you have convincing reasons why ~ should be used instead of ^.

[raymondfeng]

I'll merge the PR and fix the dependency conventions in a different one.