Move main program files to 'prog', add support for CLI-based interfaces (no boot file).

boot/helicopter.ks

@@ -4,7 +4,7 @@ parameter debug is false.
 
 Bootstrap(
 "/boot/helicopter",
-"/init/helicopter",
+"/prog/helicopter",
 list("/lib/stabilize_helicopter"),
 list("/lib/ui"),
 debug

boot/rocket.ks

@@ -16,7 +16,7 @@ local copied is list(
 
 Bootstrap(
 "/boot/rocket",
-"/init/rocket",
+"/prog/rocket",
 compiled,
 copied,
 debug

lib/boot.ks

@@ -8,11 +8,17 @@ function Bootstrap {
   if debug {
     // Open a terminal and run init.
     CORE:PART:GETMODULE("kOSProcessor"):DOEVENT("Open Terminal").
-    run "/init".
+    if init <> "" {
+      run "/init".
+    }
   } else {
     DeletePath("1:" + bootfile).
     // Set OS to boot and restart.
-    set core:bootfilename to "/init".
+    if init = "" {
+      set CORE:BOOTFILENAME to init.
+    } else {
+      set CORE:BOOTFILENAME to "/init".
+    }
     reboot.
   }
 }
@@ -38,6 +44,11 @@ function copyLibs {
 
 function compileInit {
   parameter init, debug is false.
+
+  if init = "" {
+    return.
+  }
+
   if debug {
     copypath("0:" + init, "1:/init").
     return.