Robotframework-appiumlibrary

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- `added tap functionality to keyword by shadeimi <https://github.com/jollychang/robotframework-appiumlibrary/pull/14>`_
- `Support for multiple appium connections by yahman72 <https://github.com/jollychang/robotframework-appiumlibrary/pull/13>`_

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- support app_wait_package and app_wait_activity

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- add udid and bundleid
- add background_app
- fix Resetting an application

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- replace _is_id by _is_index, id is keep same as `find_elements_by_id <http://selenium-python.readthedocs.org/en/latest/api.html#selenium.webdriver.remote.webdriver.WebDriver.find_elements_by_id>`_.
- Change Location Strategy of "Input text" and "Input Password", not only index and name.
- update demo demo/test_android_contacts.txt

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fix "Locating elements by accessibility_id"

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add keywords as below:

- Get current context
- Get contexts
- Switch to context