Imports moved to allow use built-in generators in settings (import uses settings)
Merge pull request #140 from amatellanes/master

Added gen_ipv4() and gen_ipv6() methods
Merge pull request #142 from tourlines/imports_moved_to_allow_use_built-in_generators_in_settings

Imports moved to allow use built-in generators in settings
Added chars argument in gen_string() generator