Warn users if they use babel-minify as a Babel plugin instead of a Webpack plugin

[jakearchibald]

If you're using babili, it's sub-optimal compared to BabiliWebpackPlugin (why).

Unless there's a good reason to use babili within babel-loader rather than a BabiliWebpackPlugin, babel-loader should show an informative warning.

[daurnimator]

FYI your links are dead.

[mgol]

The name was changed, it's now BabelMinifyWebpackPlugin. Here's the "why" section.