Added base PasswordMaker class.
Coded first version of password maker.
Added a static function to get a factory.
Made Factory methods chainable by having  them return this.
Added print_some_pwds.groovy test script.
Added some tests to print_some_pwds.groovy.
Added reset function to Factory and some tests in print_some_pwds.groovy
Added some tests to print_some_pwds.groovy.
Removed bug in first assertion at PasswordMaker.getRandomIntBetween().
Moved character sets String constants to CharacterSets class, for sharing with future class PasswordChecker.
Added SAFE variants for char sets (removed characters that can be confused with one another).
Added setCharCount() convenience function to Factory for when min == max number of characters.