Subo el código con 3 issues corregidos:
      - Página no encontrada
      - Resolución de pantalla a 1024x768 aceptada
      - NoVNC con 2 botones accesibles, para enviar Contr+Alt+Supr y hacer pantalla completa
	modified:   CygnusCloud/controllers/administrator.py
	modified:   CygnusCloud/controllers/administrator.py.bak
	modified:   CygnusCloud/controllers/teacher.py
	modified:   CygnusCloud/controllers/vncClient.py.bak
	modified:   CygnusCloud/languages/es.py
	modified:   CygnusCloud/progress.log
	modified:   CygnusCloud/static/css/default.css
	modified:   CygnusCloud/static/noVNC/vnc_simple.html
	modified:   CygnusCloud/views/vncClient/VNCPage.html
	modified:   CygnusCloud/views/vncClient/VNCPage.html.bak