new and create working
added navigation menu to admin tools
renamed admin layout
add super controller AdminTools and controler Groups
Groups and Students controller
add student's page password generation for groups
new view get_task and new redirection when user is not admin
Merge pull request #10 from diplay/admin-tools

Admin tools
added group report
improved group report page
bug fix
improved password generator view and fixed some bugs in V task editor
Merge pull request #11 from diplay/master

bug fix
fix
Merge pull request #12 from diplay/results-dev

Results dev
results controller
students' login transliteration
fixed
preparing to add results' editing. add student#destroy
models, controller changes and new js