Añado la página de detención de máquinas virtuales para alumnos. Hago algún retoque en las css
	modified:   CygnusCloud/controllers/administrator.py
	modified:   CygnusCloud/controllers/student.py
	modified:   CygnusCloud/controllers/student.py.bak
	modified:   CygnusCloud/languages/es.py
	modified:   CygnusCloud/models/menu.py
	modified:   CygnusCloud/static/css/default.css
	modified:   CygnusCloud/static/images/favicon.ico
	modified:   CygnusCloud/static/images/favicon.png
	modified:   CygnusCloud/static/images/image03.jpg
	modified:   CygnusCloud/views/administrator/runVM.html
	modified:   CygnusCloud/views/administrator/runVM.html.bak
	modified:   CygnusCloud/views/layout.html
	new file:   CygnusCloud/views/student/stopVM.html