Quickmail can be allowed for student, which allows students to see list of classmates

* Added new config setting to allow site admins to disallow student access to Quickmail
* Added behat tests
* Fixed minor bug in which ferpa configs were not being retrived by load_config.
added columns to show whether the message was sent to all users
corrected get_context to be context_XXXX, and fixed SQL to include additional moodle fullname requirements
made the get_full_name SQL backwards compatible so it will work in 2.5
bugs
bugs
bugs
bugs:  needed to be reintialized in the foreach loop line 280 lib.php
fixed per page log record
fixed per page log record
made it so the user can enter emails outside of the selection field. validation, csv for the email text box, etc...
removed german lang folder
Added lines for non-html message between message body and signature
Merge branch 'master' into additional_email
formatting
Formatting
Formatting fixes
Merge pull request #128 from lsuits/additional_email

Additional email
fixed empty additional email bug
don't trigger email error on empty string