create readme

README.md

+# handrumr.lv2
+handrumr lv2 plugin
+
+config stored as json:
+
+```
+{
+"folder" : "/path/to/samples/",
+"instruments" : [
+ {
+  "name": "Kick",
+  "key": 36,
+  "layers": [
+  {
+   "min": 0,
+   "samples" : [
+    { "file": "kick1.wav" },
+    { "file": "kick2.wav" }
+   ]
+  }, ...
+```              
+