added should_be_same, should_not_be_same assertions
added should_be_same, should_not_be_same assertions

BennieCopeland/NSpec,nspec/NSpec,mattflo/NSpec,mattflo/NSpec,mattflo/NSpec,nspec/NSpec,mattflo/NSpec,nspectator/NSpectator,nspectator/NSpectator,BennieCopeland/NSpec