Create new keyword and default arguments

Originally submitted to Google Code by GodTdd on 26 Sep 2011

When I want to implement new keyword, that has arguments as a input, currently ride will set the arguments in the following way:
*** Keywords ***
to do stuff ${foo} ${bar}

to do stuff
[Arguments] ${arg1} ${arg2}

Now, it would be really handy if the arguments given to the new keyword could be directly used as default arguments in the new key word. Example like this:
*** Keywords ***
to do stuff ${foo} ${bar}

to do stuff
[Arguments] ${foo} ${bar}

Most of the cases, at least me, I am changing the new keyword default arguments to the same as was an input. I agree that in some cases this is not valid but at least they are mode better than the current ${arg1}, ${arg2} and so on

The issue names no files, tests, or entry points, so first locate the code path that creates a new keyword and its [Arguments] row in RIDE. Confirm the change by checking that entered call arguments are reused as defaults while existing behavior remains valid for cases where they should differ.