Require RSpec ~> 2.14.1

Pessimistically require only RSpec versions
greater than or equal to 2.14.1 or less than
3.0.0.  RSpec 3.0.0 can be enabled and the
pessimistic constraint removed after compatibility
is established.
Update version info, v1.13.2

Requires RSpec 2.14.1 with pessimistic version
constraint.  Will be replaced in the future by
a version that establishes RSpec 3.0.0 beta
compatibility.