added includes to structure

Moved header, nav, footer, and end into src/html/includes
Still including with apache
Switched html includes to a gulp task

Renamed all shtml to html
removed <!—#include apache tags
implemented gulp-file-include
created gulp include task, added to watchers and gulp build
gitignore generated html files in the root
Merge branch 'includes'
Moved prod refs to /dist/

Apache now directs to /dist as it’s root
updated all file refs to reflect /dist as the root
all compiled html now lives in /dist
/dist is now what we build to prod, nothing else
Merge branch 'includes'
Fixed build error

reorganized img and svgs
moved svgs out into the src/ directory
Merge branch 'includes'
Add gulp clean

gulp clean deletes the list directory, run it before gulp build
Merge branch 'master' of https://github.com/rideRTD/frontend