Added a fallback download link for TrID
Added a fallback download link for TrID

The original download site was experiencing some downtime (reported in #42). So I added a fallback link from the most recent snapshot of the site at archive.org.
awest1339/multiscanner,mitre/multiscanner,jmlong1027/multiscanner,jmlong1027/multiscanner,MITRECND/multiscanner,awest1339/multiscanner,awest1339/multiscanner,mitre/multiscanner,mitre/multiscanner,MITRECND/multiscanner,jmlong1027/multiscanner,jmlong1027/multiscanner,awest1339/multiscanner