added a basic test for waitForElementVisible
Merge branch 'master' of github.com:beatfactor/nightwatch

* 'master' of github.com:beatfactor/nightwatch:
  added command timers to show how long it took a command to run in ms
  fixed a small issue with showing output when disabled
  moved the test into protocol actions
  moved the path resolve into index and a few other small refactoring
  Added exclude tests option based on #110
  The screenshot path in junit must be absolute
  fixed typo in example
  style(jshint): satisfy "W004: 'prop' is already defined."
  style(jshint): satisfy "W033: Missing semicolon"
  style(jshint): satisfy "W109: Strings must use singlequote."
  style(white): fix trailing whitespaces
  Allowing client API to use the keys command from the Selenium protocol.
rename external globals property into globals_path