[dev-context] messages

Hi, I have done some corrections of the Czech section of messages in x-set-11.tex. Coding is UTF-8. Please can you incorporate it to distro? Then I have some related questions: 1. ma-cb-en uses \shortsetup{placeblock} but AFAICS 'placeblock' (and for ma-cb more interesting 'placetable' too) is not defined somewhere. Will the definition be added or we will not use it in the manual? 2. What is the origin of interface/cont-??.xml ? It is prepared manually or somewhat generated? Thank you Vit