avoid Fixnum#{minutes,hours,days,weeks,months)

* they come from activesupport, and I'd like to avoid using that if
  possible
Kernel#Array() is very similar to Array#wrap()

* and Array#wrap() is from activesupport, so let's see if we can do
  without it
stop using String#squish

* it's from active support and we want to stop depending on that
avoid String#starts_with?

* it's from active support and I want to stop using that
explictly require the appropriate mocha setup file
stop requiring active_support

* I've removed all references too it, so it's not used any more
update readme to mention when activesupport time helpers can be used