Adds foundational file structure.

Mostly just skeleton files. Been trying to debug to the gulp-sass/gulp-watch
pipeline. Apparently if we have gulp watch SASS files it will only compile
once before registering file changes and then doing nothing.

Reading documentation for gulp-sass + gulp-watch has proved fruitless so
far. Using onSuccess in the sass options for gulp-sass proves that at
least the initial compile is being done but not subsequent compiles. Using
onError produces no output. The next steps may to debug this issue in either
watch or sass itself, we'll see how much time there is to debug this issue.