improve install.py after problems with linse-gas10ka

- use --break-system-packages for pip
- rename box
- remove some unused stuff about display

cfg/linse-gas10ka_5b265c.cfg

@@ -0,0 +1,17 @@
+[NETWORK]
+; please refer to README.md for help
+eth0=dhcp
+eth1=192.168.1.1
+eth2=192.168.2.2
+eth3=192.168.3.3
+
+[ROUTER]
+8080:192.168.127.254:80
+
+[DISPLAY]
+; please refer to README.md for help
+startup_text=startup...|HOST|ADDR
+
+[FRAPPY]
+cfg = kapillarheizung
+port= 5010