update documentation

README.md

@@ -22,5 +22,6 @@ $ git submodule update --init --recursive
 
 * [puredata.info](http://puredata.info) starting point for puredata
 * [pdpatchrepo.info](http://www.pdpatchrepo.info) online repository-website with many community repos
+* [must have externals 2020](https://docs.google.com/spreadsheets/d/11Crgg1d4DqxToUyTrf4TxzwM9IJEMmq2MZ7TbWBMDIo/edit#gid=0)
 
 > Last but not least: [get in touch with the community here](http://puredata.info/community)

unsorted/int2sym.pd

@@ -0,0 +1,37 @@
+#N canvas 764 603 358 319 10;
+#X obj 159 172 list;
+#X obj 42 114 t f f;
+#X obj 42 206 sel 0;
+#X obj 74 135 t f f;
+#X obj 74 157 spigot;
+#X obj 184 149 t l l;
+#X obj 42 228 t b b;
+#X obj 42 46 t f f;
+#X obj 184 63 % 10;
+#X obj 42 91 i;
+#X obj 42 68 / 10;
+#X obj 184 127 list append;
+#X obj 184 85 + 48;
+#X obj 159 194 list tosymbol;
+#X obj 42 21 inlet;
+#X obj 159 216 outlet;
+#X connect 0 0 13 0;
+#X connect 1 0 2 0;
+#X connect 1 1 3 0;
+#X connect 2 0 6 0;
+#X connect 3 0 4 0;
+#X connect 3 1 4 1;
+#X connect 4 0 7 0;
+#X connect 5 0 0 1;
+#X connect 5 1 11 1;
+#X connect 6 0 0 0;
+#X connect 6 1 11 1;
+#X connect 7 0 10 0;
+#X connect 7 1 8 0;
+#X connect 8 0 12 0;
+#X connect 9 0 1 0;
+#X connect 10 0 9 0;
+#X connect 11 0 5 0;
+#X connect 12 0 11 0;
+#X connect 13 0 15 0;
+#X connect 14 0 7 0;