add jquery active wait for finding elemnet

[jollychang]

for every element find

[j1z0]

I do like the idea of adding jQuey support but I have a concern with the way it is implemented in this pull request.
The issue I have has to do with performance. I someone is not using jQuery this incurs and extra round trip for every single element find. This make a big difference in overall performance when using a remote client.

I would rather see an option added to the library init such as UseJquery it should default to false abd only call the jQuery bits if its value is true.

[jollychang]

@j1z0 ok，I will try to add as a option

[jollychang]

update as options from import Selenium2Library

[peritus]

I always implement this in "Robot Framework userland":

*** Keywords ***
Wait For Ajax
Wait for Condition return window.jQuery.active == 0;

And I think it's better kept that way.

[omahlama]

I agree with @peritus, there are cases where you want to do things without waiting for ajax, so the choice should be left to the end user. Maybe documenting this as a typical use scenario would be useful instead.

[peritus]

@omahlama Yes, documentation would be great, also could include examples for all popular Ajax wrapping frameworks!

[emanlove]

Consensus seems to be to use a Robot Framework keyword instead of suggested pull request. Added issue #175.