randomize date in string representation with possible formatting
randomize date in string representation with possible formatting
removing unnecessary classes, using dateRangeRandomizer for fetching a date
Merge branch 'dateStringRandomizer' of github.com:dziga/jPopulator into dateStringRandomizer

Conflicts:
	src/main/java/io/github/benas/jpopulator/impl/DefaultRandomizer.java
	src/main/java/io/github/benas/jpopulator/randomizers/DateStringRandomizer.java
adding java doc to date string and numeric string randomizers
Adding tests for date string randomizer
Merge pull request #17 from dziga/dateStringRandomizer

Date string randomizer