comment changes

Author: dkeeney

README.md

@@ -428,7 +428,7 @@ distribution packages as listed and rename them as indicated. Copy these to
 | googletest.tar.gz      | https://github.com/google/googletest/archive/refs/tags/release-1.11.0.tar.gz |
 | eigen.tar.bz2          | https://gitlab.com/libeigen/eigen/-/archive/3.4.0/eigen-3.4.0.tar.gz |
 | mnist.zip     (*note4) | https://github.com/wichtounet/mnist/archive/3b65c35ede53b687376c4302eeb44fdf76e0129b.zip |
-| pybind11.tar.gz        | https://github.com/pybind/pybind11/archive/refs/tags/v2.9.2.tar.gz |
+| pybind11.tar.gz        | https://github.com/pybind/pybind11/archive/refs/tags/v2.6.2.tar.gz |
 | cereal.tar.gz          | https://github.com/USCiLab/cereal/archive/refs/tags/v1.3.2.tar.gz |
 | sqlite3.tar.gz         | https://www.sqlite.org/2022/sqlite-autoconf-3380200.tar.gz |
 | digestpp.zip           | https://github.com/kerukuro/digestpp/archive/34ff2eeae397ed744d972d86b5a20f603b029fbd.zip |

external/README.md

@@ -10,7 +10,7 @@ integrated into the cmake-based build of htm.core.  The code that does this are
 - eigen.cmake      - Downloads eigen 3.4.0  (header only)
 - gtest.cmake      - Downloads and installs googletest 1.11.0
 - mnist_data.cmake - Downloads the mnist data set from repository master.
-- pybind11.cmake   - Downloads and installs pybind11 2.9.2  (header only)
+- pybind11.cmake   - Downloads and installs pybind11 2.6.2  (header only)
 - libayml.cmake    - Downloads and installs libyaml 0.2.5 which is an alternative to yaml-cpp (default) 
 - cpp-httplib.cmake- Downloads and installs cpp-httplib 0.10.4, a REST server (header only)
 - cerial.cmake     - Downloads and installs cerial 1.3.2, a serialization package (header only)

external/pybind11.cmake

@@ -23,6 +23,7 @@ if(EXISTS "${REPOSITORY_DIR}/build/ThirdParty/share/pybind11.tar.gz")
 else()
     set(URL https://github.com/pybind/pybind11/archive/v2.6.2.tar.gz)
 #    set(URL "https://github.com/pybind/pybind11/archive/refs/tags/v2.9.2.tar.gz")
+#  This caused an error regarding Base64 someplace inside pickle load. Reverting to 2.6.2
 endif()
 
 message(STATUS "obtaining PyBind11")