adding project 4

projects/project4/Project4Description.md

projects/project4/researchServer/.gitignore

projects/project4/researchServer/app.js

projects/project4/researchServer/bin/www

projects/project4/researchServer/package-lock.json

projects/project4/researchServer/package.json

projects/project4/researchServer/public/index.html

...searchServer/public/javascripts/researchFormValidation.js

...oject4/researchServer/public/stylesheets/researchForm.css

projects/project4/researchServer/routes/index.js

projects/project4/researchServer/views/error.ejs

projects/project4/researchServer/views/result.ejs