Install docs into share/doc/ rather than include/

--- CMakeLists.txt.orig	2020-09-04 01:23:31 UTC
+++ CMakeLists.txt
@@ -737,7 +737,7 @@ foreach(pkgconfig IN ITEMS "${qhull_SHAREDR};Qhull ree
     if(LIBRARY_NAME STREQUAL "libqhull")
         set(LIBRARY_NAME "qhull")
     endif()
-    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
+    if(FALSE AND CMAKE_BUILD_TYPE STREQUAL "Debug")
         string(REGEX REPLACE "_(.)$" "_\\1d" LIBRARY_NAME ${LIBRARY_NAME})
         string(REGEX REPLACE "([^d])$" "\\1_d" LIBRARY_NAME ${LIBRARY_NAME})
     endif()