Add mouseClickWithWait and mouseClickWithButtonAndWait

[53845714nF]

I create two new functions, mouseClickWithWait and mouseClickWithButtonAndWait.
These functions wait that an Element exist and then click. It saves the wait commands that would otherwise have to be made.

from xmlrpc.client import ServerProxy

session = ServerProxy('http://localhost:9000')

session.mouseClickWithWait('mainWindow/buttonImage', 400)
session.mouseClickWithButtonAndWait('mainWindow/buttonImage', 1,  400)

mouseClickWithWait have two parameters, the first the path and the second the timeout.
mouseClickWithButtonAndWait have the path, the mouse key and the timeout.

[faaxm]

I prefer to keep spix more limited to the base operations and leave "convenience wrappers" to the client side. Otherwise one could argue that every command could profit from an integrated waitForPath, doubling the methods. And while I cannot think of another interesting combination like this, I am a little bit afraid of the combinatorial explosion happening if anyone ever came up with one ;-)

This is exactly the same as "waitForPath(...); mouseClick(...);", or am I missing something?