[Contacts] Tests and FFOS plugin

[Piotr Zalewa <pz...@mozilla.com>]

I've added FFOS support
(https://github.com/zalun/cordova-plugin-contacts)

I needed to modify the tests as well to make it work under FFOS
FFOS Contacts API requires the app to by "privilleged" which bans inline 
javascript.
(https://github.com/zalun/cordova-mobile-spec)


I've been working on automated tests only. Test 21 was depending on test 
20. I modified test 20 so it's deleting the gContactObj.
21 is now testing returned (from save) fields like addresses, 
organizations and categories.

I haven't yet updated the manual test and it isn't working well yet.
I haven't yet added quirks to the docs, it's gonna happen soon.

It would be good if someone would check if the tests are working on 
other devices. Thanks.
-- 
Piotr Zalewa
Mozilla