update Travis config for deployment
update Travis config for deployment
update Travis config for deployment

delete folder before upload
fix build errors/warnings
update Travis config for deployment

only build html-zh
update Travis config for deployment

try only delete the folder without upload
update Travis config for deployment

upload without deleting the folder, because no easy way to delete the folder recursively
update Travis config

no upload individual files because it is too slow
just upload the compressed archive
update Travis config for deployment

correct curl ftp upload script
update Travis config for deployment

correct archive's root path