Add missing C++ headers. Sort headers (#540)

diff --git a/setup.py b/setup.py
index 425e6c5..e9bc3c3 100644
--- a/setup.py
+++ b/setup.py
@@ -18,18 +18,21 @@
     headers=[
         'include/pybind11/attr.h',
         'include/pybind11/cast.h',
+        'include/pybind11/chrono.h',
+        'include/pybind11/common.h',
         'include/pybind11/complex.h',
         'include/pybind11/descr.h',
         'include/pybind11/eigen.h',
+        'include/pybind11/eval.h',
+        'include/pybind11/functional.h',
         'include/pybind11/numpy.h',
+        'include/pybind11/operators.h',
+        'include/pybind11/options.h',
         'include/pybind11/pybind11.h',
+        'include/pybind11/pytypes.h',
         'include/pybind11/stl.h',
         'include/pybind11/stl_bind.h',
-        'include/pybind11/common.h',
-        'include/pybind11/functional.h',
-        'include/pybind11/operators.h',
-        'include/pybind11/pytypes.h',
-        'include/pybind11/typeid.h'
+        'include/pybind11/typeid.h',
     ],
     classifiers=[
         'Development Status :: 5 - Production/Stable',