refactoring => inline variable
Merge branch 'count_ip_addresses'
test => pad one digit
test => pad digits
refactoring => simplify statement
test => seconds
test => minutes
test => hours
refactoring => remove duplication
test => hours unlimited
Merge branch 'human_readable_time' into master
add test into all-tests.html
test => mixed
Merge branch 'human_readable_time'