Finding the right element in Sub-Menu-Structures

For cases when dropDown-Elements are links with role=menuitem itself.
Merge pull request #20 from AndreasIgelCC/master

Small Change for exacter focus the right inner-element in dropdown menus
Code example for Basic Implementation

Update README.md
Merge pull request #21 from mpnkhan/master

Code example for Basic Implementation
Injecting ARIA roles for dropdown and increasing random number
Merge branch 'master' into gh-pages