Changelog
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Version 0.2
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 - tree view recalls expansion state of flag parameter nodes
 - fixed saving of Flag Schemes
 - cleaned code, removed a PPT from docs (issue #1)

Version 0.1
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 - first version
 - predefined flag schemes for Landsat 4-8 QA bands and FORCE QAI
 - flag schemes can be saved and restored to/from XML files
 - example data set with Landsat 8 TOA + Quality Assessment image