first pass at using gulp
use lodash as poor-man's grunt-template equivalent
process sass files
add css gulp task
gulp-useref to do some of the usemin stuff
move code around - add task dependencies
gulp copy images
gulp add fonts
fix task ordering
use browser-sync
use lazypipe for assets
minify html
use file revisions
use gulp-rev-all for asset versioning
change dates / timezone info.

see https://github.com/jekyll/jekyll/issues/1069
svgmin/htmlmin
add misc. files and fix rev-all