Remove Windows/Visual Studio files

I have no intention of supporting Windows.
These files are just adding clutter; get them out of the way.
Remove files generated by autotools
Remove configure.in

configure.ac looks newer.
Remove bootstrap

Use autoreconf for this.
Remove .cvsignore files
Remove files generated by autoreconf

The Makefile.in files are generated nowadays, but these don't look
generated.  Reference this commit for the old behavior.

c/Makefile also looks handwritten, but old and inaccurate.
Remove an old vim swap file
Sanitize file permissions
Move bitmaps to qtgui2/

I don't know if it will find them, but it doesn't build right now.
Move them later if this is a problem.
Rename flex++/bison++ input files to match existing output files
Remove files generated by flex++/bison++

These can be regenerated like so:
bison++ -d -o parser.cpp -h parser.h parser.y
flex++ -8 -oscanner.cpp -hscanner.h scanner.l

Don't insert a space after flex++'s -o and -h flags,
it won't know how to handle it.
Remove old merge conflict files

I assume the .mve extension means "Mike Van Emmerik"?
Remove obsolete header <osfcn.h>

This is unused.  Apparently it was some old compatibility header.
Remove RCS keywords and file history comments

Use your version control software if you need to reference a file's
history.
Remove Windows __declspec voodoo
Remove Visual Studio warning suppression pragmas
Remove workarounds for Visual Studio's lack of long long
Remove nonstandard <direct.h> and single-argument mkdir()
Clean up macro guards

Symbols beginning with '__', or '_' followed by a capital letter are
usually reserved.  Don't use them.  Also fix some inconsistencies where
it defines one symbol but checks for another that's slightly different.
Normalize line endings