Remove prompt on apt-get

install.sh

@@ -1,8 +1,8 @@
 
 echo Install rpitx - some package need internet connexion -
 sudo apt-get update
-sudo apt-get install  libsndfile1-dev
-sudo apt-get install imagemagick
+sudo apt-get install -y libsndfile1-dev
+sudo apt-get install -y imagemagick
 sudo mknod /dev/rpidatv-mb c 100 0
 cd src
 make -j4