Add DeathBeforeBirthTest
Add DeathBeforeBirthTest test methods.
Add test method to confirm number of DeathBeforeBirth errors.
Add three methods to generate ArrayList of DeathBeforeBirth errors.
Add DeathBeforeBirth methods to OutputDisplayer to display individuals with deaths before births.
Capitalized miscellaneous lowercase "Sep" in Gedcom file to keep months consistent in uppercase form.
Generate new DeathBeforeBirthTest class based on updated logic from DeathBeforeBirth class.
Modify tests for DeathBeforeBirth.java class.
Merge pull request #7 from cs-555/test-death-before-birth

Test death before birth