Add function list_project_assessors to get list of all assessors on a
project
Complete overhaul of updating, combines update of modules and processors
into single loop. Uses XnatUtils.list_project_assessors() to do a much
quicker update of open tasks
Complete update including creating assessors and updating jobs
Deleting other update scripts since we now only need update.py
Revert "Deleting other update scripts since we now only need update.py"

This reverts commit 05a2c8ca2170c938da1eedbaa20e283024b86253.
Change name of lock file prefix to lockfile_prefix instead of
settings_filename to avoid confusion
Change default queue limit to 900, rearrange some functions for
readability
So we really do want to delete these because we don't want to allow
separate module and processor updates
Remove update_open_tasks, to keep separated.
Cleanup formatting
Merge branch 'master' of https://github.com/VUIIS/api.git into better_update
Merge changes from Job-failed-uploaded branch, fixed a few typos
Update XnatUtils.py

Typo Error fixed.
Merge pull request #14 from VUIIS/better_update

Better update