Allow the authentications to be loaded in the IO independently
Mark class as abstract
Fix typo
Return path of the downloaded file
Fix VCS drivers to always use identifiers and not tag names since those can change or disappear
Update tests
Merge pull request #2187 from benjisg/fix-AutoloadNamespacesGenerator

Fixes the autoload_namespaces generator
Fix issue where none root composer.json could be used by ArtifactRepository http://www.php.net/manual/en/ziparchive.locatename.php#85512
Improved variable name.
Adjust GitDriver tag parsing to resolve to SHAs
load IO configuration
Merge pull request #2195 from bendavies/archive-manager-authentication

ArchiveManager IO configuration
Add another svn auth failed string to check (older svn server version)
Merge pull request #2201 from DerManoMann/svn-auth

Add another svn auth failed string to check (older svn server version)
Describe stability flags more consistently
Merge pull request #2203 from johnbenz13/doc-stabflags

Describe stability flags more consistently
Fix build
Update help docs for the global command

I noticed that COMPOSER_HOME/vendor/bin was wrong. Correcting.
Add a note about customizations
Improve global command to support short command resolution