no default caps for appium
better mobile examples
added unit test for appium defaults
README update [ci skip]
Release note update [ci skip]
0.2.14
Merge pull request #281 from Jonahss/master

-ios_uiautomation -> -ios uiautomation
making hast/port configurable in mobile tests [ci skip]
use concat, not union
Merge pull request #285 from owiber/master

use concat, not union to add callback
added 'accessibility id' locator strategy; added '-android uiautomator' locator strategy