Add compute_asset_path to Webpack::Rails::Helper

[duderman]

This way you will be able to include your webpack assets like this:

javascript_include_tag 'bundle'
stylesheet_link_tag 'styles', media: 'all'

[mipearson]

I've thought about this change for a while, and I've decided not to merge it.

The reason why is that I the years I've been doing Rails, the most frequent problem I've had is with gems that override / extend existing Rails methods, as this does.

While the solution you've implemented here is quite benign and well written, I worry about conflicts / problems with future Rails versions / other gems, and the behaviour of using super in a helper has always bugged me (as helpers are mixins rather than subclasses)

[mikegreiling]

:(