Fixed installing platform gems
Restored concurrent requires
Fixed installing gems with extensions with --install-dir
Fixed `gem fetch -v` to install the latest version
Fixed installing gems with "./" in their files entries
* test/rubygems/test_gem_package.rb: Tests for the above.
* NEWS: Updated for RubyGems 2.1.3
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42938 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
verifying unsigned gems (instead of crashing).
* test/rubygems/test_gem_security_policy.rb: Tests for the above.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39153 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* test/rubygems/test_gem_package.rb: Test for the above.
* lib/rubygems/security/policy.rb: Ensure digests are present when
verifying a gem and match the number of signatures bidirectionally.
* test/rubygems/test_gem_security_policy.rb: Test for the above.
* lib/rubygems.rb: Documentation improvements (by zzak)
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39126 b2dd03c8-39d4-4d8f-98ff-823fe69b080e