add logic to handle Unicode beta period file names

In downloader.rb, add logic to handle file names of the form
UnicodeData-12.0.0d6.txt. To find the right file, we download
the index of the directory. Then we download the files by finding
the file names from the index. Files are always checked for changes,
because changes might be frequent during the beta period.
We also check whether any index.html files are left when we are not
in the beta period. This would indicate that we might have stale
data from the beta period rather than the actual release data.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66737 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

0 files changed, 0 insertions, 0 deletions