use variable for python executable

ctl

@@ -10,6 +10,8 @@ BASE=`pwd`
 SYSTEM=`uname -s`
 PLATFORM=`uname -m`
 
+PYTHON=python3
+
 DATA="$BASE/data"
 if [ ! -e "$DATA" ] && [ -e "$BASE/config" ]; then
     if [ "$1" == "stop" ] || [ "$1" == "restart" ]; then
@@ -95,7 +97,7 @@ if [ "$1" == "start" ]; then
             exit 1
         fi
     fi
-    python3 oml server "$PID"
+    $PYTHON oml server "$PID"
     exit $?
 fi
 if [ "$1" == "debug" ]; then
@@ -107,7 +109,7 @@ if [ "$1" == "debug" ]; then
         fi
     fi
     shift
-    python3 oml server debug "$PID"
+    $PYTHON oml server debug "$PID"
     exit $?
 fi
 if [ "$1" == "stop" ]; then
@@ -147,11 +149,11 @@ if [ "$1" == "open" ]; then
             if ps -p `cat "$PID"` > /dev/null; then
                 xdg-open "file://${BASE}/openmedialibrary/static/html/load.html"
             else
-                python3 "${NAME}/oml/gtkstatus.py" $@
+                $PYTHON "${NAME}/oml/gtkstatus.py" $@
                 exit $?
             fi
         else
-            python3 "$NAME/oml/gtkstatus.py" $@
+            $PYTHON "$NAME/oml/gtkstatus.py" $@
             exit $?
         fi
     fi
@@ -163,7 +165,7 @@ if [ "$1" == "autostart" ]; then
     fi
     if [ $SYSTEM == "Linux" ]; then
         if [ ! -e "$PID" ]; then
-            python3 "$NAME/oml/gtkstatus.py" --autostart
+            $PYTHON "$NAME/oml/gtkstatus.py" --autostart
             exit $?
         fi
     fi
@@ -172,7 +174,7 @@ fi
 
 if [ "$1" == "ui" ]; then
     shift
-    python3 "$NAME/oml/ui.py" $@
+    $PYTHON "$NAME/oml/ui.py" $@
     exit $?
 fi
 if [ "$1" == "init" ]; then
@@ -210,17 +212,17 @@ if [ "$1" == "update" ]; then
         NEW=`"$0" version`
         "$0" postupdate -o $OLD -n $NEW
     else
-        python3 oml update
+        $PYTHON oml update
     fi
     exit $?
 fi
 if [ "$1" == "python" ]; then
     cd "$BASE/$NAME"
     shift
-    python3 $@
+    $PYTHON $@
     exit $?
 fi
 
 cd "$BASE/$NAME"
-python3 oml $@
+$PYTHON oml $@
 exit $?