Change list

• New Advanced-By.md file for advanced AndroidBy & iOSXCUITFindBy usage
• Updated javadoc links for UiAutomator and Class Chain concepts

Types of changes

What types of changes are you proposing/introducing to Java client?
Put an x in the boxes that apply

• No changes in production code.
• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Details

The main goal here was to document these uiAutomator and iOSClassChain attributes within the java client documentation. You'll note that the README is incomplete - I tried to use the server source code to figure out how UiScrollable works, but didn't get very far.

I did find these two files in the main appium source. Should I make a pull request to update either of those instead/as well?