Parsing files with ParseMode
Fix external library references.

Add libraries to multiple projects via NuGet.
Update ISummaryGenerator interface.

Add fileReader field to MatchingFile struct.
Add SummaryGeneratorFactory.
Update SummaryGeneratorTest.

Adjust SummaryGeneratorTest code so that it works with recent changes to
SearchSummary module.
Update SummaryGenerator module; fix library dependencies (NuGet)

- Update SummaryGeneratorTest.
- Adjust SummaryGeneratorTest code so that it works with recent changes to
  SearchSummary module.
- Add SummaryGeneratorFactory.
- Update ISummaryGenerator interface.
- Add fileReader field to MatchingFile struct.
- Fix external library references.
- Add libraries to multiple projects via NuGet.
Add PDFDocumentBuilder class and their tests

Implement header and save metod.
Add comments in Normalizer and rename some private methods
Add PreprocessorFactoryTest. Change PreprocessorTest.
piszę Inflector i InflectorTest
Inflector class - Part II
Inflector and InflectorTest classes - Part III
Rewrite AddHeader method and add few others

Change library PDFSharp to MigraDoc.
Write internalTest for PDFDocumentBuilder.
Add congig file
Add search result context in reports - WIP

- Add extracting context & result positions to a more useful class
- Add position-aware stream reader
- Add IDocumentBuilder.AddText
- Add multiple tests for PositionTestPair and PositionTestPairGroup
- Adjust existing tests so that they pass with recent changes
Add automatic NuGet package downloading on build
Fix broken assembly references, insert placeholder PDFDocumentBuilder.AddText
Fix PDFDocumentBuilder.Save and its test
Add Begin/EndContextBlock, rename AddText to AddContextText in IDocumentBuilder
Add implementation to changed interface