Add autoprefixer
Clean less task
Change main.min.css to main.css
Fix clean of bower folder
Clean build
Remove unnecessary properties
Change filerev to rev
Remove htmlCompressor
Reconfigure htmlmin
Change imagemin to imageoptim

For better compression
Uses jshint-stylish
Add jsonminify e jsonlint
Generates sourceMaps for less
Uses bower folder
Add recess
Fiz usemin folders
Fix watch for better performance