Fix build for latest GHC 7.6.3 libraries

Various changes in the base and elsewhere have broken the build for
snaplet-sqlite-simple.  Fix imports & sample code to build with
today's versions.

example/example.cabal

@@ -18,25 +18,25 @@ Executable example
   main-is: Main.hs
 
   Build-depends:
-    base                  >= 4     && < 5,
-    bytestring            >= 0.9.1 && < 0.11,
-    heist                 >= 0.11  && < 0.15,
+    base,
+    bytestring,
+    heist,
     lens,
-    mtl                   >= 2     && < 3,
-    snap                  >= 0.13  && < 0.14,
-    snap-core             >= 0.9   && < 0.11,
-    snap-server           >= 0.9   && < 0.11,
-    snap-loader-static    >= 0.9   && < 0.11,
-    snaplet-sqlite-simple >= 0.4   && < 1.0,
-    sqlite-simple         >= 0.1   && < 1.0,
-    text                  >= 0.11  && < 1.3,
-    time                  >= 1.1   && < 1.5,
-    either                >= 3.1,
-    errors                >= 1.3   && < 1.5
+    mtl,
+    snap,
+    snap-core,
+    snap-server,
+    snap-loader-static,
+    snaplet-sqlite-simple,
+    sqlite-simple,
+    text,
+    time,
+    either,
+    errors
 
   if flag(development)
     build-depends:
-      snap-loader-dynamic >= 0.9 && < 0.11
+      snap-loader-dynamic
     cpp-options: -DDEVELOPMENT
     -- In development mode, speed is already going to suffer, so skip
     -- the fancy optimization flags.  Additionally, disable all

example/src/Application.hs

@@ -10,6 +10,7 @@ module Application where
 
 ------------------------------------------------------------------------------
 import Control.Lens
+import Control.Monad.State
 import Snap
 import Snap.Snaplet.Heist
 import Snap.Snaplet.Auth

src/Snap/Snaplet/Auth/Backends/SqliteSimple.hs

@@ -39,6 +39,7 @@ module Snap.Snaplet.Auth.Backends.SqliteSimple
   ) where
 
 ------------------------------------------------------------------------------
+import           Control.Applicative ((<$>), (<*>))
 import           Control.Concurrent
 import           Control.Lens ((^#))
 import           Control.Monad

test/App.hs

@@ -7,6 +7,7 @@ module App where
 ------------------------------------------------------------------------------
 import           Control.Lens
 import           Control.Monad
+import           Control.Monad.State
 import           Prelude hiding (catch)
 ------------------------------------------------------------------------------