make nav bar responsible to different width
making and styling home page
making the basic ui for about
build basic view for all events, all records and their separates
Merge branch 'kai_develop' of http://github.com/sunkai612/NTUGSA_site into juin_develop

Conflicts:
	app/assets/javascripts/application.js
	app/views/common/_footer.html.erb
	app/views/common/_navbar.html.erb
	app/views/site/home.html.erb
	db/schema.rb
merge kai_develop and fix some errors