0.4 compat updates

Author: quinnj

src/SQLite.jl

@@ -7,12 +7,11 @@ export Data
 
 if !isdefined(Core, :String)
     typealias String UTF8String
-    unsafe_string(ptr, len) = bytestring(ptr, len)
 end
 
 if Base.VERSION < v"0.5.0-dev+4631"
+    unsafe_string = bytestring
     unsafe_wrap{A<:Array}(::Type{A}, ptr, len) = pointer_to_array(ptr, len)
-    unsafe_string(ptr, len) = utf8(ptr, len)
     unsafe_wrap(::Type{String}, ptr, len) = unsafe_string(ptr, len)
 end