Removed deprecation warnings of respec 2.14.x

* calls to stub/mock replace with double
* this just affects stub to create a double object, not .stub
  for stubbing methods
* Huge thanks to @mbuettner for helping me figure out the regex
  for this saving a ton of time.. it's like: /(?<![.])stub/ :-)
Merge pull request #326 from PragTob/rspecStubAndMockDeprecations

Removed deprecation warnings of respec 2.14.x