DataCube language switching

- [ ] Switch language of chart without a need to refresh the query
- [ ] If I switch to EN in the following viz. the dimension on X axis is still in Czech.
  http://live.payola.cz:29080/visualize/datacube#/id/248?view=chart&chartType=column&isPolar=false&p=6429e236f380eafdc1534a3c3d8ce484

Also #67.
