Make the struct and traits modules private.

Now that the documentation of public export of private modules is inlined on the exporter's
documentation, there is non need to export anything but the `na` module.

src/lib.rs

@@ -119,8 +119,8 @@ extern mod std;
 extern mod extra;
 
 pub mod na;
-pub mod structs;
+mod structs;
-pub mod traits;
+mod traits;
 
 // mod lower_triangular;
 // mod chol;

src/na.rs

@@ -45,7 +45,7 @@ pub use structs::{
     Mat1, Mat2, Mat3, Mat4,
     Mat5, Mat6,
     Rot2, Rot3, Rot4,
-    Vec0, Vec1, Vec2, Vec3, Vec4, Vec5, Vec6
+    Vec0, Vec1, Vec2, Vec3, PVec3, Vec4, Vec5, Vec6
 };
 
 //

src/structs/mod.rs

@@ -2,17 +2,17 @@
 
 pub use self::dmat::DMat;
 pub use self::dvec::DVec;
-pub use self::vec::{Vec0, Vec1, Vec2, Vec3, Vec4, Vec5, Vec6};
+pub use self::vec::{Vec0, Vec1, Vec2, Vec3, PVec3, Vec4, Vec5, Vec6};
 pub use self::mat::{Identity, Mat1, Mat2, Mat3, Mat4, Mat5, Mat6};
 pub use self::rot::{Rot2, Rot3, Rot4};
 pub use self::iso::{Iso2, Iso3, Iso4};
 
-pub mod dmat;
+mod dmat;
-pub mod dvec;
+mod dvec;
-pub mod vec;
+mod vec;
-pub mod mat;
+mod mat;
-pub mod rot;
+mod rot;
-pub mod iso;
+mod iso;
 
 // specialization for some 1d, 2d and 3d operations
 #[doc(hidden)]