Changes for version 1.015
- Fix RT#120722 (Reason for Module::Signature dependency unclear since 2008)
- "require" a non-broken version of Digest::SHA
- remove other crypto related "recommends"
- Switch from Module::Install to ExtUtils::MakeMaker
- avoids the hassle with Module::Install for Perl without "." in @INC
- add some resources cf META.json