Deprecate be_true and be_false in favour of be_truthy and be_falsey.
Merge branch '2-99-maintenance' of https://github.com/rspec/rspec-expectations into deprecate-be-true-and-be-false
Alias be_falsy to be_falsey.

Signed-off-by: Sam Phippen <samphippen@googlemail.com>
Merge pull request #285 from samphippen/deprecate-be-true-and-be-false

Deprecate be_true and be_false in favour of be_truthy and be_falsey.