Editing Release Notes for FM Beta 0.4.18

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1. New Features
---------------
1.1 The FM source code editor and advanced mode controls have
    been split off into a separate window from the main FM dialog
    window.  The two windows are "modeless" (i.e., you can freely
    switch back and forth between them) and run as separate tasks.
    The principal benefit of this change is that the main FM dialog
    now works in truly WYSIWYG mode.  In particular, you can use the
    Dialog:size and Dialog:region specifications in the FM editor
    window to control the size and region of the FM dialog window,
    and the effects will be accurately reflected in the dialog
    window at design time.

1.2 Preliminary support has been added for 16-bit deep image modes
    (i.e., 16-bit Grayscale and 48-bit RGB).  The proxy preview
    now displays correctly in these modes although, of course, the
    preview is only 8 bits deep, since few if any display drivers
    support 16-bit color depth.  The src() and pset() functions
    now operate correctly in 16-bit mode.  However, other functions
    such as tset(), t2set(), tget(), and t2get() do *not* yet
    support 16-bit mode; and the built-in variables r, g, b, R,
    G, and B also do *not* recognize 16-bit mode, which means
    that the R/G/B handlers do not yet support 16-bit mode.
    While you can now write a simple ForEveryTile handler to
    process a 16-bit image using just the src() and pset()
    functions, we suggest you wait for full 16-bit support to
    be implemented in a subsequent release before expending
    any serious effort on writing 16-bit filters.

1.3 Ten new predefined global string variables str0, str1,..., str9
    have been added.  Each of these variables is of type char[256].

1.4 The FM source editor now recognizes Ctrl-A as a short cut for
    the "Select All" operation.

1.5 The FM source editor now accepts the Tab character as a valid
    source code character.  Default tab stops are set at every
    multiple of 4 characters.

2. Changes
----------
2.1 Several internal changes have been made to the host/plug-in
    interface for better compatibility with the AVIedit host
    application; however, FM still does not operate correctly
    with AVIedit.

2.2 The "Big gulp failed" error message is now issued only in
    debug versions of FM.

2.3 The maximum number of temporary variables in the FM evaluation
    stack has been increased from 100 to 200, thus greatly
    increasing the complexity of expressions that can be compiled.
    
2.4 The previous limit of ~100 arguments per function call has
    been doubled to ~200.  However, the number of floating-point
    arguments in a function call is still limited to 8.

2.5 FM now recognizes '8B)M' as the signature for the Tryout
    version of Adobe Premiere 5.0.

3. Bug Fixes
------------
3.1 A memory leak that could occur whenever a compilation was aborted
    has been fixed.

4. Known Problems
-----------------
4.1 Message boxes issued by the main FM dialog window can sometimes
    be hidden behind the FM Source Editor window.  If FM just "dings"
    when you click either the FM window or the Editor window, try moving
    the windows around to discover if there is a hidden message box
    waiting for your input.

4.2 Specifying Dialog:drag=background causes the titlebar ToolTip to
    appear anywhere in the draggable body of the FM dialog.

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