Refactor of MainWindow class

Remove commented out code
Restore proper C# method naming convention
Download from database, tests
Merge branch 'Core' of https://github.com/kzemek/PrzeszukiwarkaPlikow
Use NUnit framework for PatternMatching tests.
Some test groups merged into test cases.
Merge branch 'Core'
Revert "Persistance manager"

This reverts commit ae107d252afb00a49be3c29dca599217aa7c65fc.
sdfasdfasdf
Merge branch 'SearchSummary' into PersistanceManager
nterface change
Fixed class structure
NewSearch class skeleton
Added GetPhrases() method to ISearch
SaveSearch implementation
Update function name in call (SaveSearch)
Klasa Normalizer - testuję
Test2
Klasy Normalizer i Inflector
Merge branch 'Master' into Preprocessing.Inflector
Inflector - pierwsza wersja odmiany
Deleted unnecessary file