move extras docs into API section

Author: bahmutov

README.md

@@ -42,6 +42,16 @@ beforeEach(() => {
 // you get fresh mini-app running in each test
 ```
 
+### Extras
+
+* Mounted component's actions object is attached to the global `Cypress` variable.
+* The `mount` function adds an action `_getState` to the `actions` object, if there is not one already present. This allows you to get the current state of the component for inspection.
+
+```js
+Cypress.main.setName('Joe')
+expect(Cypress.main._getState().name).to.equal('Joe')
+```
+
 ## Use
 
 In your Cypress spec files (the example below is from file [cypress/integration/hello-world-spec.js](cypress/integration/hello-world-spec.js)) mount the application, just like you would "normally".
@@ -95,16 +105,6 @@ See video of tests running on CI on the project's [Cypress Dashboard][cypress da
 * `npm run cy:open` starts Cypress GUI, which is great for TDD mode
 * `npm run cy:run` runs Cypress headlessly, testing all specs. Same command [runs on CI](.travis.yml) with additional `--record` argument to record the run and send to the [Cypress Dashboard][cypress dashboard url]
 
-## Extras
-
-* Mounted component's actions object is attached to the global `Cypress` variable.
-* The `mount` function adds an action `_getState` to the `actions` object, if there is not one already present. This allows you to get the current state of the component for inspection.
-
-```js
-Cypress.main.setName('Joe')
-expect(Cypress.main._getState().name).to.equal('Joe')
-```
-
 ### Small print
 
 Author: Gleb Bahmutov <[email protected]> © 2017