Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/materials/materials/MAT_FELT b/doc/materials/materials/MAT_FELT
new file mode 100644
index 0000000..ead7d49
--- /dev/null
+++ b/doc/materials/materials/MAT_FELT
@@ -0,0 +1,21 @@
+Materialid:
+MAT_FELT "felt"
+
+Name:
+"Filz" "Filzes" "Filz" "Filz"
+
+Geschlecht:
+M
+
+Beschreibung:
+- nicht vorhanden -
+
+Erkennbarkeit:
+- keine Einschraenkung -
+
+Gruppenzugehoerigkeit:
+MATGROUP_INFLAMMABLE:100
+MATGROUP_CLOTH:100
+MATGROUP_BIO:100
+MATGROUP_FLEXIBLE:100
+MATGROUP_SOLID:100