Merge pull request #114 from uid/registration

Registration
Merge pull request #115 from uid/872bb805035030ff6ce467dff77ddad037df4469

Photo and Markdown Bio migration
Better formatted strings for memberships and semesters
Fixed crash that occured when creating a new assignment.
Better printing of submissions
Adding debug commands to README
Better strings for batches and assignments
Changing what can be edited on a chunk. Better strings for some things. Fixed a crash.
Misc bug fixes. Added semester support to preprocessor. Added bulk user creation form.
Better handling of a non-existant user in preprocessor.
Adding batches to checkstyle comments.
Routing works.
merged branch mglidden-preprocessor-refactor
changed form and review activity copy