[add Applicative instance for ELT
Helmut Grohne <grohne@cs.uni-bonn.de>**20150226130646
 Ignore-this: 2ae530e71bfd3e5531d2d911d181db2e
 
 This is necessary to support the Functor-Applicative-Monad Proposal.
] hunk ./src/Igor2/Logging/Logger.hs 28
+import Control.Applicative (Applicative, pure, (<*>))
hunk ./src/Igor2/Logging/Logger.hs 148
+instance (Functor m, Monad m) => Applicative (ELT m) where
+    pure = ELT . pure
+    ELT f <*> ELT m = ELT (f <*> m)
+