Move nodes into subfolders

meshroom/nodes/test/ls.py

@@ -0,0 +1,16 @@
+from meshroom.core import desc
+
+
+class Ls(desc.CommandLineNode):
+    commandLine = 'ls {inputValue} > {outputValue}'
+    input = desc.FileAttribute(
+        label='Input',
+        uid=[0],
+        )
+    output = desc.FileAttribute(
+        label='Output',
+        value='{cache}/{nodeType}/{uid0}/ls.txt',
+        isOutput=True,
+        hasExpression=True,
+        )
+