Clean up cruft and obsolete windows files

Added more visualstudio cruft to the .gitignore
Removed suo and vcxproj.user files, shouldn't be in repos
dsp and dsw files were from vc++ circa 1998
original sln and vcproj were from vs circa 2005
dev file was from an out of date version of Dev-C++
VC9.vcproj wasn't being used, other than conversion to vcxproj

moved sdl_winmain to windows folder, which was renamed win32,
and removed windows specific files from macosx project, all
to mimic what's already being done in /macosx (i.e. should
be for os specific files, not just ide-specific projects)
Remove empty and unused file
Remove dreamcast changelog and makefile
Remove Windows CE support (dreamcast vestige?)
Merge pull request #6 from theinternetftw/cleanup-cruft-and-obsolete-files

Cleanup cruft and obsolete files