Merge pull request #7 from xini/master

BUGFIX: correct return values and clean up code
Replaces deprecated function validEmailAddr with Email::validEmailAddress

Email::validEmailAddress is existing in SilverStripe 2.3 already and is used nowadays in SilverStripe versions.
Merge pull request #10 from pstaender/patch-1

Replaces deprecated function validEmailAddr() with Email::validEmailAddress()
ADD pull request #5 by MattyBalaam
ADD composer.json