Switch to MB so that RAM requirements can be more granular

src/freedombone-app-etherpad

         exit 7359
     fi
 
-    check_ram_availability 2
+    check_ram_availability 2000
 
     if [ -f $IMAGE_PASSWORD_FILE ]; then
         ETHERPAD_ADMIN_PASSWORD="$(printf `cat $IMAGE_PASSWORD_FILE`)"

src/freedombone-app-matrix

 }
 
 function install_matrix {
-    check_ram_availability 2
+    check_ram_availability 1500
 
     if [ ! -d $INSTALL_DIR ]; then
         mkdir -p $INSTALL_DIR

src/freedombone-utils-setup

 }
 
 function check_ram_availability {
-    minimum_ram_gb="$1"
-    minimum_ram_bytes=$((minimum_ram_gb * 1024 * 1024))
+    minimum_ram_MB="$1"
+    minimum_ram_bytes=$((minimum_ram_gb * 1024))
 
     ram_available=$(grep MemTotal /proc/meminfo | awk '{print $2}')
     if [ $ram_available -lt $minimum_ram_bytes ]; then
-        echo $"Need at least ${minimum_ram_gb}GB RAM to install this app"
+        echo $"Need at least ${minimum_ram_gb}MB RAM to install this app"
         exit 783524
     fi
 }