DOC: update notes for makeMesa

- building with 12.x still seems not to work

README.org

@@ -51,6 +51,10 @@
     + FFTW        http://www.fftw.org/fftw-3.3.4.tar.gz
     + libccmio    http://portal.nersc.gov/svn/visit/trunk/third_party/libccmio-2.6.1.tar.gz
 * Notes
+*** Building ADIOS
+    + Currently requires GNU autoconf tools (eg, autoconf, autoheader, automake)
+    for its configuration.
+    + Optionally uses zlib, bzip2 development headers (eg, zlib-devel, libbz2-devel).
 *** Building Scotch
     + The zlib library and zlib development headers are required.
 * Notes

makeMesa

@@ -29,8 +29,10 @@
 #     Build script for Mesa
 #
 # Note
-#     Building with mesa-12.0.1 failed to install an "osmesa.h" file,
-#     which renders it useless for off-screen VTK.
+#     Building with mesa-12.x.x fails to create an include/GL directory and
+#     an "osmesa.h" file. Both make it fairly useless for off-screen VTK.
+#
+#     Building with mesa-11.x is fine and mesa-13.0.0 also seems to be okay.
 #
 #------------------------------------------------------------------------------
 mesaPACKAGE=mesa-11.2.2