Add create_dmd_release utility.
fix release year define
delete-trailing-whitespace
print help message if invoked without arguments
don't clone over SSH
remove dependency on external zip/7z tools

- use std.zip for archiving and extracting
- rename --archive-zip option to --archive
  and --combine-zip to --combine
Merge pull request #25 from dawgfoto/patch-1

fix release year define
Merge pull request #2 from MartinNowak/create_dmd_release

create dmd release
Update libcurl version to 7.34.0
Merge pull request #28 from eco/patch-4

Update libcurl version to 7.34.0
Merge pull request #24 from Abscissa/create_dmd_release

Add create_dmd_release utility.