Documentation update.
1. Renamed ceres.tex to ceres-solver.tex
2. Updated Solver::Options docs to reflect the recent changes.
3. Updated .gitignore to ignore ceres-solver.pdf
Change-Id: Iea19f8ff5fa1638a498422c8be5ed2e6da2950c9
diff --git a/docs/helloworld.tex b/docs/helloworld.tex
index 2caaf14..e0d5f1d 100644
--- a/docs/helloworld.tex
+++ b/docs/helloworld.tex
@@ -1,4 +1,4 @@
-%!TEX root = ceres.tex
+%!TEX root = ceres-solver.tex
\chapter{Hello World!}
\label{chapter:tutorial:helloworld}
To get started, let us consider the problem of finding the minimum of the function
