ci(gh-pages): prevented removal of files that arent in the src branch
ci(gh-pages): prevented removal of files that arent in the src branch

this wont be a good long term solution because of filenames changing each time the contents change,
but the --remove flag isnt working as expected. this should at least prevent the removal of CNAME
with every deploy until i hear back on https://github.com/tschaub/gh-pages/issues/179

travi/presentations,travi/presentations