http://webpack.github.io/docs/webpack-for-browserify-users.html
$ webpack --devtool inline-source-map
# Add inlined SourceMaps
$ webpack --devtool source-map
# Emit SourceMaps as separate file
$ webpack --devtool eval
# Emit SourceUrls within evals (faster)
$ webpack --devtool eval-source-map
# Emit inlined SourceMaps within evals
$ webpack --debug
# Add more debugging information to the source
$ webpack --output-pathinfo
# Add comments about paths to source code
# (Useful when using no or the eval devtool)
$ webpack -d
# = webpack --devtool source-map --debug --output-pathinfo
