replace png with jpg to speed up loading
Mobile friendly

update col-xs-6 to col-md-6
Merge pull request #10 from mark86092/master

Mobile friendly
small fix
	modified:   index.html
Merge branch 'master' of https://github.com/phys-tw/camp2015

Conflicts:
	index.html
add item to reg form
Merge pull request #11 from phys-tw/master

update form master