Preliminary commit of changes to add Gateway module. This adds to WeBWorK - the ability to create versioned, timed problem sets ("gateway tests") for which all problems are displayed on a single page ("versioned" means that students can get multiple versions of the problem set), - the ability to create sets that draw problems from groups of problems, and - the ability to create sets that require a proctor login to start and grade. Sets can be defined as gateway tests or proctored gateway tests from the ProblemSetDetail page. Not quite bug-free yet. Known bugs include handling of problem values on the Student Progress page (I think this may be a problem with changing from sql database format where all entries were 'text' to sql_single in ver 2.1, where they are integer), and a division by zero error on the grades page (which may be the same problem). Tests with a number of attempts per version greater than one haven't been carefully tested, nor has scoring of gateway tests.
new default classlist file. * no more all-caps first/last names * global_user status is drop * global_user and practice users have empty passwords specified * practice users have permission level -5 * professor has password "professor" specified * professor has permission level 10
set student_id == user_id for non-student users. this will help prevent inadvertant collisions, as we're no longer making up fake student IDs.
added default classlist file
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