v1.2 - bugfixes and elgg integrations

this is my first ever pull request.. so possibly i am missing some detail.. we shall see!

this commit includes new graphics for the 3 supported webmail services, plus integration of elgg styles and various bugfixes.
the example.php file is replaced by openinvite.php (which will allow the vendor folder to be more easily over-written if needed).
i have converted many language strings to be elgg specific strings.