Merge branch 'release/1.11' into develop
Merge branch 'hotfix/1.12' into develop
Fix error message
Fix handing of empty values for get_meta call in Config::Versioned
Change get_hash call in Memory connector to return a copy

Prevents that the user changes the memory structure while dealing
with the returned hash
Merge pull request #13 from oliwel/develop

Fixes for memory and C::V connector
bump version to 1.13
Merge branch 'release/1.13'