adding options: --package-conf and --no-user-package-conf

These command line options work just like the similar-named GHC flags.
They are useful when working with non-standard package databases.

Browse.hs

@@ -10,7 +10,7 @@ import Types
 ----------------------------------------------------------------
 
 browseModule :: Options -> String -> IO String
-browseModule opt mdlName = convert opt . format <$> browse mdlName
+browseModule opt mdlName = convert opt . format <$> browse opt mdlName
   where
     format
       | operators opt = formatOps
@@ -22,9 +22,9 @@ browseModule opt mdlName = convert opt . format <$> browse mdlName
       | otherwise = '(' : x ++ ")"
     formatOps' [] = error "formatOps'"
 
-browse :: String -> IO [String]
-browse mdlName = withGHC $ do
-    initSession0
+browse :: Options -> String -> IO [String]
+browse opt mdlName = withGHC $ do
+    initSession0 opt
     maybeNamesToStrings <$> lookupModuleInfo
   where
     lookupModuleInfo = findModule (mkModuleName mdlName) Nothing >>= getModuleInfo