Update locales-cs-CZ.xml

Changed date form Numeric. I the Czech Republic common style is:: 
"day. month. year" e.g. 9. 10. 2013 with space after dot. Form without space is also available.

Form "year-month-day" is not so common, it is usually used in formal correspondence.

Standard delimiter is "-" e.g. 8.-15. 12. 2013
but in this case must be delimiter with space " - ": 8. 6. - 15. 6. 2013
Source: http://prirucka.ujc.cas.cz/?id=810&dotaz=datum (The Institute of the Czech Language of the Academy of Sciences of the Czech Republic, p.r.i.)
Update locales-cs-CZ.xml
Merge pull request #54 from libora/patch-2

Update locales-cs-CZ.xml