Log now has the step function name
Adding check for anonymous functions.

As suggested by @n1k0
Merge pull request #426 from sreeix/log_with_function_name

refs #425 Log now has the step function name
refs #427 - Added sendKeys options keepFocus (with docs and test)
Merge branch 'sendkeys-options-keepFocus' of https://github.com/jfparadis/casperjs into sendkeys-options-keepFocus