Install headers, libraries and pdf

Headers are installed in ${CMAKE_INSTALL_PREFIX}/include/ceres
Libraries are installed in ${CMAKE_INSTALL_PREFIX}/lib
pdf is installed in ${CMAKE_INSTALL_PREFIX}/share/ceres/docs

Change-Id: Ic175f2c2f5fa86820a1e8c64c2ed171f4a302a68
diff --git a/CMakeLists.txt b/CMakeLists.txt
index afc8fe5..fbdbc86 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -514,6 +514,12 @@
   ${EIGEN_INCLUDE}
   )
 
+FILE(GLOB CERES_HDRS ${CMAKE_SOURCE_DIR}/include/ceres/*.h)
+INSTALL(FILES ${CERES_HDRS} DESTINATION include/ceres)
+
+FILE(GLOB CERES_PUBLIC_INTERNAL_HDRS ${CMAKE_SOURCE_DIR}/include/ceres/internal/*.h)
+INSTALL(FILES ${CERES_PUBLIC_INTERNAL_HDRS} DESTINATION include/ceres/internal)
+
 IF (${SUITESPARSE})
   INCLUDE_DIRECTORIES(${AMD_INCLUDE})
   INCLUDE_DIRECTORIES(${CAMD_INCLUDE})