Fix default language setting, extended --setfield

With the last pull request, there was a problem with the austrian language setting. It was set to `de-DE`. The problem was, that I used it with the `server` and for testing switched to de-DE. Then I frogot to return to de-AT ... So the workflow is errorprone. .... 

I did fix it with extending the `--setfiled` command line parameter. It now has an optional parameter `rawtext` to inject raw plain text into tiddler fields. This allows us to overwrite tiddlers at build time, to set special variables, which may be changed while editing with --server ...

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* Removed a lot of `~` signs in ControlPanel witch are not necessary any more. 
* bld-languages.sh now contains scripts from fullbuild.sh