Merge pull request #4 from JasonGuanGitHub/master

pull request
1、修改了maintainer/instrument的页面，使部分字段不显示。
2、在application/new页面，添加了自定义域，可以保存。
Merge branch 'master' of github.com:specialhappy/EasyUse

Conflicts:
	app/views/customer/appointments/new.html.erb
Merge pull request #58 from specialhappy/master

页面上自定义域可添加可保存。