added -f option to filter filename formats. Uses minimatch module
added a check for data
Merge branch 'master' of github.com:beatfactor/nightwatch

* 'master' of github.com:beatfactor/nightwatch:
  Update README.md
added optional abortOnFailure parameter to waitForElementPresent command to enable the test to continue if the assertion fails
Merge branch 'master' of github.com:t00f/nightwatch into t00f-master

* 'master' of github.com:t00f/nightwatch:
  added -f option to filter filename formats. Uses minimatch module
renamed --format to --filter and updated runner
updated examples
version number bump