wip
finished work for sprint 002, minus any specs
more required arguments in assign_task routine, load details by default in search tasks
Merge pull request #13 from openstax/task-reorg-1

Task API reorganization + reading task work for sprint 002
Added user search and profile show, update and destroy API's
Coveralls experiment
Updated gems; Fixed users controller spec
Klass API WIP
Changed API error object to match the API Guidelines
Added spec placeholders
Klass controller, access policies, spec etc and some student stuff
Student and klass controller specs done
Added routing specs
Klass and student access control specs
Access policies for schools and their respective specs
Fixed issues after rebasing
Removed puts