Moved action type into action module.

src/lib.rs

@@ -5,7 +5,7 @@ mod mtterror;
 mod name;
 mod queue;
 
-use action::{DocDef, MsgAction, Query, UserAction};
+use action::{Action, DocDef, MsgAction, Query, UserAction};
 use document::{
     clock::Clock,
     create::CreateDoc,
@@ -13,7 +13,6 @@ use document::{
     session::Session,
 };
 use message::{
-    action::Action,
     wrapper::{Addition, CalcValue, Calculation, Message, Operand},
 };
 pub use mtterror::MTTError;