Doku-Update fuer Materialien und Material-DB

Change-Id: I97ab95b14c834ee5b0e68295a25471a0bf4d8c96
diff --git a/doc/materials/.synonym b/doc/materials/.synonym
new file mode 100644
index 0000000..b2118e1
--- /dev/null
+++ b/doc/materials/.synonym
@@ -0,0 +1,2 @@
+materialdb MatDB
+neues_material_howto MatDB