add rotator (bootstrap carousel)
add upload function
make nav bar responsible to different width
add image source to rotator
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
Build basic UI for reviewing post and new comment page
build basic UI for new post page and add-on data dependent
Merge branch 'kai_develop' of http://github.com/sunkai612/NTUGSA_site into juin_develop
Build basic UI for viewing all posts
Merge branch 'kai_develop' of http://github.com/sunkai612/NTUGSA_site into juin_develop

Conflicts:
	Gemfile
pull from kai_develop
modify seed.rb