Update README.md

some more fixes to README.md

README.md

@@ -201,7 +201,7 @@ After some time, it should be possible to get the host name with
 
 ### e) Install Display Firmware (control box only)
 
-If the display is in test mode. finish it by touching several times.
+If the display is in test mode, finish it by touching several times.
 Then install the firmware:
 
 > cd boxtools
@@ -220,7 +220,7 @@ You are asked to confirm or change the image name.
 
 ## Installation of a Fresh Raspberry Pi 
 
-### install from cloned image (work currently from a Mac only)
+### install from cloned image (work currently from a Mac only, or may be from another raspberry)
 
 Put compute module into PoE adapter, connect microUSB 'POWER' to
 a USB power supply, and connect micorUSB 'SLAVE' to your computer.