Backported basic code for MIDI controller autodetection (custom config file per controller), plugins with example plugin, and Akai APC Key 25 feedback plugin

plugins/MidiActionsTestPlugin.py

@@ -0,0 +1,51 @@
+import data_centre.plugin_collection
+from data_centre.plugin_collection import ActionsPlugin, SequencePlugin
+
+class MidiActionsTestPlugin(ActionsPlugin,SequencePlugin):
+    disabled = True
+
+    def __init__(self, plugin_collection):
+        super().__init__(plugin_collection)
+
+    @property
+    def parserlist(self):
+        return [ 
+                ( r"test_plugin", self.test_plugin ),
+                ( r"cycle_shaders", self.cycle_shaders ),
+                ( r"run_automation",  self.run_automation ),
+                ( r"stop_automation", self.stop_automation ),
+                ( r"toggle_pause_automation", self.toggle_pause_automation ),
+                ( r"pause_automation", self.pause_automation ),
+                ( r"toggle_loop_automation", self.toggle_loop_automation ),
+        ]
+
+    def test_plugin(self):
+        print ("TEST PLUGIN test_plugin CALLED!!")
+        # can now access various parts of recur via self.pc
+
+    cycle_count = 0
+    def cycle_shaders(self):
+        print ("Cycle shaders!!!")
+        if self.cycle_count>9:
+            self.cycle_count = 0
+
+        for i,shader in enumerate(self.pc.message_handler.shaders.selected_shader_list):
+            self.pc.midi_input.call_method_name(
+                "play_shader_%s_%s" % (i, self.cycle_count), None
+            )
+            self.pc.midi_input.call_method_name(
+                "start_shader_layer_%s" % i, None
+            )
+        self.cycle_count += 1
+
+    duration = 5000
+    frequency = 50
+    def run_sequence(self, position):
+        self.pc.midi_input.call_method_name(
+                "set_the_shader_param_0_layer_0_continuous", position
+        )
+
+        self.pc.midi_input.call_method_name(
+                "set_the_shader_param_1_layer_0_continuous", position
+        )
+