Merge pull request #244 from mfem/mfem_47_doc

Documentation for PyMFEM 4.7 release

docs/changelog.txt

@@ -1,5 +1,22 @@
         <<<  Change Log. >>>
 
+2024 08
+      * MFEM 4.7 support
+        - AttributeSets are supported. ex39 and ex39p are added to demonstrate how to use it from Python
+	- Hyperbolic conservation element/face form integrators (hyperbolic.hpp) are supported. ex18.py and
+	  ex18.py are updated to conform with the updated C++ examples.
+	- Update SWIG requirement to >= 4.2.1 (required to wrap MFEM routines which use recent C++ features)
+	- Buiding --with-libceed will download libceed=0.12.0, as required by MFEM 4.7
+	- Fixed eltrans::transformback
+	- Improved testing using Github actions
+	  - New caller and dispatch yml configulations allows for running a test manually
+	  - Test runs automatically for PR and PR update
+	  - Test using Python 3.11 is added
+        - Refresh install instruction (Install.md)
+	- Python 3.7 has reached EOL and is no longer supported. This version will support Python 3.8 and above, and  
+          will likely be the last version to support Python 3.8.
+
+
 2023  11 - 2024 01
       * MFEM 4.6 support
        - Default MFEM SHA is updated to a version on 11/26/2023 (slightly newer than