Added podspecs for NRGramKit 1.1 and 1.4

Strangely, they were missing from CocoaPods Specs repo— who knows why the author of NRGramKit never added them for any version of NRGramKit past 1.0.
Merge pull request #4376 from capnslipp/master

Added podspecs for NRGramKit 1.1 and 1.4