added base gui stub
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minimal working GUI
some fixes
bibfilterfile->bibolamazifile
missing rename file in previous commit
work on gui interface
work done
missing file ok.png
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fixed bugs with line numbers and other issues.
working on source & filter instance editors
work on filter instance editor
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filter editor a bit better
UI for filter options etc. now works pretty well
bugfixes & small enhancements
some small fixes
added Qt-autogenerated files
work in progress: adding support for cache