Don't download "optional" files not in Release :/.
-rw-r--r-- 1900 .gitignore
-rw-r--r-- 1253 .travis.yml
-rw-r--r-- 1947 AUTHORS
drwxr-xr-x - CMake
-rw-r--r-- 6575 CMakeLists.txt
-rw-r--r-- 1029 COPYING
-rw-r--r-- 18007 COPYING.GPL
-rw-r--r-- 795 README.SrvRecords
-rw-r--r-- 9727 README.md
-rw-r--r-- 2338 README.progress-reporting
drwxr-xr-x - abicheck
drwxr-xr-x - apt-inst
drwxr-xr-x - apt-pkg
drwxr-xr-x - apt-private
drwxr-xr-x - cmdline
drwxr-xr-x - completions
drwxr-xr-x - debian
drwxr-xr-x - doc
drwxr-xr-x - dselect
drwxr-xr-x - ftparchive
drwxr-xr-x - methods
-rw-r--r-- 566 mirror-failure.py
drwxr-xr-x - po
-rwxr-xr-x 9765 prepare-release
-rw-r--r-- 343 shippable.yml
drwxr-xr-x - test
drwxr-xr-x - triehash
drwxr-xr-x - vendor