RefExtractor: constants and news
Grapher: refs included and complex fixture
Test fixture relocation
Scanner: first scanner, missing Repo arg
CLI: scanner
Grapher: ignoring array type hinted
GraphCommand
SourceUnit refactor
SourceUnit: composer.lock reader
SourceUnit and Extractor interfaces
RefExtractor: DefRepo, DefUnit and DefUnitType
Merge pull request #5 from mcuadros/master

Scanner: first scanner, missing Repo arg