Add support for task reviews to orgs

Refactor the task complete page. Now it has one button to download
the output file, one buttong to go to a new page where a review
can be subbmitted and one button to got to a new page which displays
all reviews for that task (including input and output file reviews).
Refactors the task review template so it can be used on numerous
pages. Closes #498
Fix url for claimed tasks page and remove redundant code

Add the user id to the claimed tasks page so admins can view
other users claimed tasks
Fixed merge conflicts