Support adding webpack loaders through task config.
Support adding webpack loaders through task config.

jakefleming/mezzotent,vigetlabs/gulp-starter,vigetlabs/gulp-starter,greypants/gulp-starter,jakefleming/mezzotent,jakefleming/mezzotent,jakefleming/mezzotent,greypants/gulp-starter,vigetlabs/gulp-starter,greypants/gulp-starter,vigetlabs/gulp-starter,greypants/gulp-starter