Add Tutorial_ReadWriteFiles.rst to Tutorials.rst

Author: DorianDepriester

Examples/example_readwrite.py

@@ -0,0 +1,10 @@
+from Elasticipy.FourthOrderTensor import StiffnessTensor
+
+C = StiffnessTensor.from_MP("mp-1048")
+C.save_to_txt("TiNi.txt")
+C.save_to_txt("TiNi.txt", matrix_only=True)
+
+C2 = StiffnessTensor.from_txt_file("TiNi.txt")
+Cu2= StiffnessTensor.from_txt_file("TiNi.txt")
+
+