1.3.0: Merge pull request #15 from WouterJ/sf-28

Added Symfony 3.0 support

1.2.0: Merge pull request #14 from hason/keytype

Added key_type option

1.1.0: Merge pull request #11 from alanpoulain/master

Added key_options option

1.0.0

made mapping to a KeyValueContainer object optional (and false by def…

…ault)