added functionality to send a password pdf with tans, when user is aproved. Add column pin charvar(6)  to table users. Add function to validad a Tan, generated by the SCS.
 moved function for pdf encryption and generating zip file to helper.php
Merge branch 'master' of https://github.com/SecureCodingTeam7/Phase3

Solved Conflicts:
	phase3/class/c_user.php
	phase3/login.php
Die scheiße gemergt