Fix minify options to configurable.

In our project, we use angular.js and all template html is compiled into a javascript file.
But we test the compiled version app, we found that all input[type=text] css value is not applied,
because html-minifier remove 'type' propery from the input tag.
So I fix minify option to be configurable.

USAGE:
{ test: /\.html$/, loader: 'html-loader?minify=removeRedundantAttributes:false removeComments:false'}
Add minify param to the html-loader query parameters.
The minify paramerter is space separated values and if not specified, it treated as true.