chore(README): update nightly compatibility
chore(README): update nightly compatibility

Specify 20141107 build of MarkLogic 8.0 as dependency.

omkarudipi/marklogic-samplestack,dmcassel/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,dmcassel/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,dmcassel/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,omkarudipi/marklogic-samplestack,laurelnaiad/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,ryanjdew/discovery-app-w-samplestack,omkarudipi/marklogic-samplestack,ryanjdew/discovery-app-w-samplestack,ryanjdew/discovery-app-w-samplestack,omkarudipi/marklogic-samplestack,dmcassel/marklogic-samplestack,marklogic/marklogic-samplestack,laurelnaiad/marklogic-samplestack,supriyantomaftuh/marklogic-samplestack