Removing ChunkProfile from the codebase.
Added loading batch to submission and assignment
Added is_live field to batch
Preprocessor directory, starting script file.
Basic preprocessor working
Checkstyle comments working
refactored extensions. still needs testing.
multi class migrations
Added refactored classes to admin. Fixing some crashes.
Working on refactor
Removing semesters from user profile
fixed unindent error
Merge branch 'mglidden-preprocessor-refactor' into registration
ensures that the alum.mit.edu email address has not been used before
allow primary email to be separate from alum.mit.edu email
prepopulated form fields