EU_emissions_ntb (#11)

* EU_emissions_ntb

* EU_emissions_ntb: horizontal plot bar, state labels

* get rid off states = []
squarify sort_values by emissions
squarify axis "off"

* df.merge(... suffixes) instead of df.rename

* get rid of a for cycle

* improving horizontal bar plot

* horizontal bar plot updates:
- axes("off")
- f'string instead of .format()

* horizontal bar plot updates:
- axes("off")
- f'string instead of .format()

* add color scale

* code into functions

* minor spelling changes
czech names into english