don't update the relation and cascade until after delete of the parent
fixed incomplete results on many-many after an unset of the relation. closes #304
speed improvement by replacing call_user_func_array with a faster alternative
added EAV support to from_array()
replaced call_user_func_array by our function
fixed the use of group_by in array notation, related #307
fixed dump_tree() for models using EAV. closes #302
Orm\Query fixed connection issue.

min, max and count methods was using only default connection.

Signed-off-by: Kristián Feldsam <feldsam@gmail.com>
Merge pull request #308 from feldsam/1.7/develop

Orm\Query fixed connection issue.
fixed missing node assignment
implemented lazy Sanitization for ORM models
fixed cleaning of vars linked by reference
no need to trigger a magic method here
Merge branch '1.8/develop' into bugfix_update_original_relations