Sage 8.2.0

• Use Sass Bootstrap by default (#1437)
• Remove nav walker and Bootstrap navbar (#1427)
• Remove Bootstrap gallery (#1421)
• Remove hardcoded feed link (#1426)
• Move jQuery CDN feature to Soil (#1422)
• Bump gulp-load-plugins to 0.10.0 (#1419)
• Switch from yargs to minimist (#1418)
• Remove $content_width (#1417)
• Lowercase X-UA-Compatible (#1409)
• Remove mention of Google Analytics from the config (#1384)