Added mumps.h wrapper and mumps_testing directory

Author: Matteo-Coppellotti

.gitignore

@@ -34,3 +34,18 @@ experiments/test_RSVD/performances.csv
 
 #some test directories
 experiments/
+
+#Mumps
+mumps_testing/mumps_fdapde_test
+mumps_testing/.cache
+mumps_testing/build/
+mumps_testing/data/build/
+mumps_testing/test_output.log
+!mumps_testing/CMakeLists.txt
+!mumps_testing/user_config.cmake
+!mumps_testing/data/CMakeLists.txt
+!mumps_testing/computation_times/
+!mumps_testing/computation_times/**
+mumps_testing/computation_times/build/
+mumps_testing/computation_times/build/**
+mumps_testing/computation_times/plots/**