v0.8.0

This version contains some major BC breaking changes and introduces improvements
and clean-ups. See https://github.com/rollerworks/datagrid/blob/master/UPGRADE.md for all details.

#36: Use FQCN instead of type-name for column-types
#37: Drop support for Symfony 2.3 OptionsResolver
#38: Refactor Column data-mapping and configuration
#39: Refactor text formatting
#40: Applied fixes from StyleCI
#42: Rename namespaces and methods to reduce redandent naming
#43: Refactor datagrid view handling
#44: Make label optional, use name when no label is provided
#45: Make Datagrid configuration immutable