Update documents to reflect version change.

And a few minor changes around BLAS.

Change-Id: Ie4c1eb35f7180f648493837b53f1c8bba48109d6

docs/source/citation.rst

@@ -0,0 +1,12 @@
+========
+Citation
+========
+
+If you use Ceres Solver for an academic publication, please cite this
+manual. e.g., ::
+
+  @manual{ceres-manual,
+          Author = {Sameer Agarwal and Keir Mierle},
+          Title = {Ceres Solver: Tutorial \& Reference},
+          Organization = {Google Inc.}
+  }