fix experimental web site links in experimental index.html
sync CNAME with https://github.com/ioccc-src/winner/blob/master/CNAME
improve .gitignore files
Added to each .gitignore file, comments on how to sort.
Put into winner .gitignore files, ignore *.dSYM files.
Put into winner .gitignore files, ignore indent.c,
indent.o and indent files. This is done so that the
winner directory can more self contained.
We did not put into winner .gitignore files, however,
excludes of .-files as found in the top level .gitignore file.
As .-files are not allowed by mkiocccentry, the top level
.gitignore file remains sufficient.
Added to year level .gitignore files, excludes of
mkentry or iocccsize files as needed.
Sorted (via sort -d -u) all .gitignore file.
Due to a request I had (allowing both www.ioccc.org and ioccc.org) a
while back Landon fixed it but this change was not done in this repo.
The hope is that this commit will mean it won't be a problem when this
repo is merged back into the winner repo.