Fix redirects handling, make VundleGithubMatch actually work, use set()
Use HEAD in place of GET to find redirects

Should be faster
Make check_candidate_with_file_list function more verbose
Make it retry after receiving ≥500 HTTP status in some cases
Fix tar file listing
Allow numbers in github/bitbucket URLs
Add rejects due to presence of too much additional significant files
Make SID, -R and -l imply --no-descriptions

Also makes -D alias to --no-descriptions
Inform about descriptions check start