Standardize and edit prompts and comments
Exclude all files starting with '_' from copy task and improve copy order
Fix bower's relative path to absolute path in H5BP template
Update app node dev dependencies, add grunt-time and load-grunt-tasks
Update tagline
Update generator package.json keywords
Re-bold welcome message
Update Compass extensions_dir to config option instead of raw
Clean up Gruntfile and normalize with Webapp 0.4.1