Bug fix for incorrectly upping the attempt count under certain conditions

git-svn-id: https://plugins.svn.wordpress.org/quiz-tool-lite/trunk@788061 b8457f37-d9ea-0310-8a92-e5e31aec5664
Committing 1.4.2

git-svn-id: https://plugins.svn.wordpress.org/quiz-tool-lite/trunk@789282 b8457f37-d9ea-0310-8a92-e5e31aec5664
New option for sending email to user with their score after test completion

git-svn-id: https://plugins.svn.wordpress.org/quiz-tool-lite/trunk@792320 b8457f37-d9ea-0310-8a92-e5e31aec5664