Add Readme for 'Tutorials'.

Author: Volodymyr Tymtsiv

app/admin_components/adf-tutorial/Readme.md

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+### Adding a new tutorial
+
+To add a new tutorial you need to do the following:
+
+1) Add a file with a scenario to tour_scenario folder which you want to implement
+2) Create a method in tutorial.controller.js which will start the tour.
+3) Create a button in main-tutorial.html.
+4) Add ng-click directive to the button with a method which will start the tour.
+
+
+Now let's look closer to these steps.
+
+### Adding scenario  
+
+You need to create a file and declare all steps related to the tour.
+
+Each step has a type. For each step, the element of the step will be highlighted.
+
+There are four step types:
+
+- click - To get the next step it is necessary to click on the element;
+- input - To get the next step it is necessary to type in the input what is described in the step and click 'next' button;
+- notice - Just highlight the element. To get the next step it is necessary to click 'next' button;
+- select - Just highlight the element
+
+Each step could have a custom logic relate to step (some action which needs to do before or after the step is shown)
+They should be declared in `eventHandlers` array.
+
+Also, each step could have buttons. 
+
+There are four type of buttons:
+
+- next
+- back
+- skip
+- done
+
+To declare a default behavior you just need to declare the button type.
+If necessary to add some custom behavior to the button you could declare `action` field in button which is a function. It will rewrite the default behavior of the button.
+
+For instance:
+
+```
+{
+   type: 'back',
+   action: function () {
+       $("#info-tab").trigger("click");
+   }
+ }
+``` 
+
+
+### Creating a method in tutorial.controller.js
+
+Example:
+```javascript
+ $scope.startServiceTutorial = function () {
+            TourBuilder.buildTour(createServiceScenario);
+        };
+
+```
+
+Where `createServiceScenario` is the name of the variable in the scenario file.
+
+
+### Adding button and use the  method from the controller
+
+
+Example: 
+
+```html
+<button class="btn btn-primary" type="button" ng-click="startServiceTutorial()">
+            Let's create a Service
+</button>
+```
+
+Where `startServiceTutorial` the method name of the new tour.
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