Fix compatibility issues with v0.4 ntuple

Author: hackjackhack

src/Options.jl

@@ -38,7 +38,11 @@ function Options{T<:OptionsChecking}(::Type{T},args...)
     end
     n = div(length(args),2)
     keys, index, vals = if n > 0
-        (args[1:2:end], ntuple(n, identity), Any[args[2:2:end]...])
+        if VERSION < v"0.4-"
+            (args[1:2:end], ntuple(n, identity), Any[args[2:2:end]...])
+        else
+            (args[1:2:end], ntuple(identity, n), Any[args[2:2:end]...])
+        end     
     else
         ((), (), Array(Any, 0))
     end