v3.1.7 release notes

Signed-off-by: Cary Phillips <[email protected]>

CHANGES.md

@@ -1,5 +1,6 @@
 # Imath Release Notes
 
+* [Version 3.1.7](#version-317-March-1-2023) March 1, 2023
 * [Version 3.1.6](#version-316-november-7-2022) November 7, 2022
 * [Version 3.1.5](#version-315-march-28-2022) March 28, 2022
 * [Version 3.1.4](#version-314-january-21-2022) January 21, 2022
@@ -15,6 +16,29 @@
 * [Version 3.0.0-beta](#version-300-beta-march-15-2021) March 15, 2021
 * [Inherited History from OpenEXR](#inherited-history-from-openexr)
 
+## Version 3.1.7 (March 1, 2023)
+
+Patch release with miscellaneous bug/doc/build fixes. In particular:
+
+- Support for relative prefix in pkg-config
+- Reorganization of documentation at https://imath.readthedocs.io
+- Add a ``trace()`` method on Matrix types
+
+### Merged Pull Requests
+
+* \[[#296](https://github.com/AcademySoftwareFoundation/Imath/pull/296)\] Move index to bottom of main page; remove top-level link
+* \[[#295](https://github.com/AcademySoftwareFoundation/Imath/pull/295)\] Fix doc typo
+* \[[#294](https://github.com/AcademySoftwareFoundation/Imath/pull/294)\] Fix documentation glitches and symbol visibility table
+* \[[#293](https://github.com/AcademySoftwareFoundation/Imath/pull/293)\] Reorganize repo/readthedocs documentation
+* \[[#292](https://github.com/AcademySoftwareFoundation/Imath/pull/292)\] Add missing licenses/copyrights
+* \[[#291](https://github.com/AcademySoftwareFoundation/Imath/pull/291)\] Support relative prefix in pkg-config
+* \[[#282](https://github.com/AcademySoftwareFoundation/Imath/pull/282)\] Remove MACOSX_RPATH forcing
+* \[[#280](https://github.com/AcademySoftwareFoundation/Imath/pull/280)\] Add trace function for matrix types
+* \[[#279](https://github.com/AcademySoftwareFoundation/Imath/pull/279)\] Define BOOST_BIND_GLOBAL_PLACEHOLDERS to suppress pragma message
+* \[[#278](https://github.com/AcademySoftwareFoundation/Imath/pull/278)\] Use Py_ssize_t in place of size_t where appropriate to avoid warnings
+* \[[#277](https://github.com/AcademySoftwareFoundation/Imath/pull/277)\] Update CONTRIBUTING.md to be consistent with OpenEXR 
+* \[[#275](https://github.com/AcademySoftwareFoundation/Imath/pull/275)\] Remove export attribute from inline half functions
+
 ## Version 3.1.6 (November 7, 2022)
 
 Patch release with miscellaneous bug/doc/build fixes.