add js / jshint tasks
add imagemin task
add csslint task
add check-task
add csslint config values to silence some unneeded warnings
remove values from jshint config file (seem to be NOT the default values)
add cachebusting task for css and js
clean up default task
code cleanup
make sure clean is called before copying tasks
clean up cachebuster init
add static and livereload server task
update readme
make src and dist dir configurable, remove cachebusting from js for now
update h5bp master src
rename server task to "serve" (lets use imperatives from now on for tasks)