Add doc module for standalone documentation

Author: jturner314

.travis.yml

@@ -6,18 +6,18 @@ matrix:
   include:
     - rust: 1.22.1
       env:
-       - FEATURES='test'
+       - FEATURES='test docs'
     - rust: stable
       env:
-       - FEATURES='test'
+       - FEATURES='test docs'
        - CARGO_INCREMENTAL=0
     - rust: beta
       env:
-       - FEATURES='test'
+       - FEATURES='test docs'
        - CARGO_INCREMENTAL=0
     - rust: nightly
       env:
-       - FEATURES='test'
+       - FEATURES='test docs'
        - IS_NIGHTLY=1
        - CARGO_INCREMENTAL=0
 branches:

src/doc/mod.rs

@@ -0,0 +1 @@
+//! Standalone documentation pages.

src/lib.rs

@@ -91,6 +91,9 @@ extern crate matrixmultiply;
 extern crate num_traits as libnum;
 extern crate num_complex;
 
+#[cfg(feature = "docs")]
+pub mod doc;
+
 use std::marker::PhantomData;
 use std::sync::Arc;