Added MeasurementsController

command:
rails generate redmine_plugin_controller body_tracking measurements
index create destroy

app/controllers/measurements_controller.rb

@@ -0,0 +1,11 @@
+class MeasurementsController < ApplicationController
+
+  def index
+  end
+
+  def create
+  end
+
+  def destroy
+  end
+end