allow using the AgaviDateDefinitions constants in addition to the constant names  when creating the datetime validator manually
closes #760
TEH NEWLINE KEKEKE
Add support for doctrine connection settings and options, closes #788
Set current Context instance on Doctrine connections, closes #800
merge c53009361110e23629fccb4ee9b47fd62112da63...9c295bdbb6141335ef614d343ec23434279496b9 (from 0.11)