FMSLogo Code

Don't register an event handler for EVT_STC_CLIPBOARD_PASTE on
wxWidgets versions less than 3.1.0, where it is not defined. This
unblocks further development for Fedora Core, whose most recent
wxWidgets library is 3.0.2.

Remove a "bool Padding" in the Turtle struct that wasn't referenced by the code. I assume this was added so that an array of Turtle would be word-aligned for performance, but compilers do this anyway and having an explicit field for padding only risks making the structure larger than needed.

Replace comments that referred to the "OWL-based version of FMSLogo" with "MSWLogo" or simply remove them. This was done to remove confusion for anyone reading the code, since the OWL-based version of FMSLogo no longer exists.

Fix a bug number reference to use the new bug number after SourceForge made each project have its own number space.

Replace a call to "sprintf" with a call to "snprintf". The only reason snprintf wasn't used originally is because Borland's compiler didn't support it. Now that FMSLogo doesn't use OWL, it does not need to use Borland's compiler, so it can use snprintf.

Change the OnPaste handler to instead by an EVT_STC_CLIPBOARD_PASTE, which became available in wxWidgets 3.1.0. This results in simpler code that does not need to access the clipboard directly.

Ignore the temporary file that is created and deleted by the READWORD benchmark.

Implement feature #32; the "X" close button on the undocked commander's title bar is now disabled.

Remove the logic that strips some text off the top of commander history if adding text to the bottom fails. This logic was a vestige from MSWLogo when the control was a simple edit control and Windows 95's edit control had a limit of how much text it could hold. This limit is no longer applicabale, since Windows 95 is not supported and the control is now a wxRichTextCtrl. As a result, the removing-from-top logic was effectively dead code.

Extend the wxWidgets 3.1.0 patch to include a fix for a regression from wxWidgets 2.8.12 that introduced strange glyphs into the logo code editors when some non-printing characters are pressed (F1-F12, media keys, etc.). The bug in wxWidgets is tracked at http://trac.wxwidgets.org/ticket/17598