Move size class table to man page.
Move the table of size classes from jemalloc.c to the manual page. When
manually formatting the manual page, it is now necessary to use:
nroff -man -t jemalloc.3
diff --git a/jemalloc/INSTALL b/jemalloc/INSTALL
index e9a8798..a895743 100644
--- a/jemalloc/INSTALL
+++ b/jemalloc/INSTALL
@@ -217,3 +217,10 @@
cd obj
../configure --enable-autogen
make
+
+=== Documentation ==============================================================
+
+The manual page that the configure script generates can be manually formatted
+prior to installation via the following command:
+
+ nroff -man -t doc/jemalloc.3