Add a template tag that interfaces with Bowers main directive

[gaqzi]

One thing I noticed with jQuery switching the path to where the main file is located is that currently things are kind of brittle.

If a library changes the location you've to go in and change the includes to get it working again.

So I suggest a tag working like this:

{% bower 'packagename' 'fallback-path-if-no-main' %}
Ex:
{% bower 'jquery' 'jquery/dist/jquery.js' %}

The main field in Bower can be a string or an array, so I would suggest that in case the main is an array the tag would pick the first item in the list. If passed in argument is packagename/file.js it'll look for that file in the array and output the path to the file. If main is just a string the filename after the slash will be matched against that file and if it doesn't match an error will be raised.

To get a listing of all the files do: bower list --paths

If you agree with this I'll implement it.

[gaqzi]

There would probably have to be a keyword argument for the base path to bower folder with the default being bower_components. Just in case one app has decided to put it in some other location.