added reposition function
modified test cases
corrected reposition function
completed test case for reposition method
Merge branch 'reorder-assignments' of https://github.com/clydeli/whiteboard into reorder-assignments
make the assignment order increment with the scope of course
add drag and drop for assignments
add reorder link to the index pages
Add NFS options to Vagrantfile and vagrant instructions.
added active_directory yml files
added active directory initializer
added gem net-ldap and ladle
gem lock
Gemlock
added active directory account migration
added active directory services file
added active_directory methods
initialized active directory services
completed create account service method
added ldap helper methods