Recent changes

[Stacho Mudrak]

There are two important changes in latest snapshot:

* import command can exist outside survey - endsurvey pair. Stations and shots 
outside survey context will not be imported.

* in layout - code tex-map/atlas, there are supported international characters. 
So currently following stuff will work as expected

code tex-map
\cavename={Jaskyňa mŕtvych netopierov}
endcode

Regards, S.