move field_type to common part

yaserde_derive/src/de/expand_struct.rs

@@ -1,6 +1,6 @@
 
 use attribute::*;
-use de::field_type::*;
+use field_type::*;
 use quote::Tokens;
 use syn::Ident;
 use syn::DataStruct;

yaserde_derive/src/de/mod.rs

@@ -1,6 +1,5 @@
 
 pub mod expand_struct;
-pub mod field_type;
 
 use attribute;
 use proc_macro2::Span;

yaserde_derive/src/lib.rs

@@ -7,6 +7,7 @@ extern crate quote;
 extern crate syn;
 
 mod attribute;
+mod field_type;
 mod de;
 mod ser;
 

yaserde_derive/src/ser/expand_struct.rs

@@ -1,6 +1,6 @@
 
 use attribute::*;
-use de::field_type::*;
+use field_type::*;
 use quote::Tokens;
 use syn::Ident;
 use syn::DataStruct;