Fluid: restructuring and rejuvenation of the source code.

* Add classes for application and project
* Removed all globals from Fluid.h
* Extracting args and project history into their own classes
* Moving globals into Application class
* Initialize values inside headers for some classes.
* Undo functionality wrapped in a class inside Project.
* File reader and writer are now linked to a project.
* Avoid global project access
* Nodes (former Types) will be managed by a new Tree class.
* Removed static members (hidden globals) form Node/Fl_Type.
* Adding Tree iterator.
* Use nullptr instead of 0, NULL, or 0L
* Renamed Fl_..._Type to ..._Node, FL_OVERRIDE -> override
* Renaming ..._type to ...::prototype
* Splitting Widget Panel into multiple files.
* Moved callback code into widget panel file.
* Cleaning up Fluid_Image -> Image_asset
* Moving Fd_Snap_Action into new namespace fld::app::Snap_Action etc.
* Moved mergeback into proj folder.
* `enum ID` is now `enum class Type`.

1 files changed, 2 insertions, 2 deletions

diff --git a/fluid/tools/ExternalCodeEditor_UNIX.h b/fluid/tools/ExternalCodeEditor_UNIX.h
index 644f22afa..2142d5a10 100644
--- a/fluid/tools/ExternalCodeEditor_UNIX.h
+++ b/fluid/tools/ExternalCodeEditor_UNIX.h
@@ -7,7 +7,7 @@
 #ifndef _EXTCODEEDITOR_H
 #define _EXTCODEEDITOR_H
 
-#include "app/fluid.h"
+#include "Fluid.h"
 
 #include <FL/Fl.H>
 
@@ -42,7 +42,7 @@ public:
   ExternalCodeEditor();
   ~ExternalCodeEditor();
   int is_editing();
-  int reap_editor(pid_t *pid_reaped=NULL);
+  int reap_editor(pid_t *pid_reaped=nullptr);
   void close_editor();
   const char *filename() { return filename_; }
   int open_editor(const char *editor_cmd, const char *code);