changed table-head of datagrid
merged with develop
changed datagrid table behaviour when responsive
added more functionality on responsive datagrid
added update event; arrow indicating overflow
merged conflicts with develop; reseting size of datagrid on refresh
changed eventnames when navigation is resizing; implemented listeners in datagrid
merged  with develop
fixed merge conflicts
Merge pull request #154 from massiveart/feature/datagrid-css

Feature/datagrid css