- adapt to new rubygem packaging style

- updated to version 4.7.4
This is probably the last release of the 4.x series. It will be merged
to ruby and will be put into maintenance mode there.

I'm not set in stone on this, but at this point further development of
minitest (5+) will be gem-only. It is just too hard to work w/in
ruby-core w/ test-unit compatibility holding minitest development
back.

* 2 minor enhancements:

* Added count/size to ParallelEach to fix use w/in stdlib's test/unit. :( (btaitelb)
* Allow disabling of info_signal handler in runner. (erikh)

- updated to version 4.7.3
* 1 bug fix:
* Reverted stubbing of module methods change. Stub the user, not the impl. (ab9/tyabe)

- updated to version 4.7.2
* 2 bug fixes:
* Fixed inconsistency in refute_in_delta/epsilon. I double negatived my logic. (nettsundere)
* Fixed stubbing of module methods (eg Kernel#sleep). (steveklabnik)

- updated to version 4.7.1
* 1 minor enhancement:

* Added FAQ section to README