Add autoprefixer and fix minification tasks

- Removed htmlmin in favor of minifyHtml
- Vulcanize should strip output now
- Only use cssmin if we're not using SASS
Fixes #64. yo polymer:el creating wrong path
Fixes #65, don't set newcap in jshint
Still need concat for js
Version up polymer dep
0.4.0-1
Add readme note about autoprefixer and external css
Version up to latest deps
0.4.0
More specific viewport meta
Version up Polymer deps