Added SimpleSet to applications
Added SimpleSet to applications
move api docs to 3x folder

/api.html route remains for backwards compat and will point to latest
stable release docs
add 4x docs as a copy of 3x docs

Not exposed to any menu yet
rebuild
api updates for 4.x
update 4x docs with Router apis
build
expose 4.x docs on menubar
build
update guide for new express-generator name
build
Merge pull request #127 from rabbitfufu/gh-pages

New example app:  SimpleSet
remove middleware docs in 4.x

@defunctzombie feel free to edit copy
Mention that type is aliased as contentType