Add some documents (#454)

* set auomation name from server if client side is nil

* add some documentations for some methods

Author: KazuCocoa

lib/appium_lib/device/multi_touch.rb

@@ -8,7 +8,7 @@ module Appium
   #
   # ```ruby
   # action_1 = TouchAction.new.press(x: 45, y: 100).wait(5).release
-  # action_2 = TouchAction.new.tap(element: el, x: 50, y:5, count: 3).release
+  # action_2 = TouchAction.new.tap(element: el, x: 50, y:5, count: 3)
   #
   # multi_touch_action = MultiTouch.new
   # multi_touch_action.add action_1

lib/appium_lib/device/touch_actions.rb

@@ -75,7 +75,8 @@ def release(opts = nil)
       chain_method(:release, args)
     end
 
-    # Touch a point on the screen
+    # Touch a point on the screen.
+    # Alternatively, you can use `press(...).release.perform` instead of `tap(...).perform`.
     #
     # @option opts [WebDriver::Element] :element (Optional) Element to restrict scope too.
     # @option opts [integer] :x x co-ordinate to tap

lib/appium_lib/ios/mobile_methods.rb

@@ -7,6 +7,13 @@ class << self
       #   ```ruby
       #    find_elements :uiautomation, 'elements()
       #   ```
+      #
+      # @!method ios_predicate_string_find
+      #   find_element/s can be used with a [Predicates](https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/Predicates/AdditionalChapters/Introduction.html)
+      #
+      #   ```ruby
+      #    find_elements :predicate, "isWDVisible == 1"
+      #   ```
       def extended(_mod)
         ::Appium::Driver::SearchContext::FINDERS[:uiautomation] = '-ios uiautomation'
         ::Appium::Driver::SearchContext::FINDERS[:predicate] = '-ios predicate string'