changed login form when the design is small
Merge branch 'master' of github.com:rkrdo/sepap2
changed admin/problems/show problems instance variable

cleaned admin/problems/show instance variable

cleaned admin/problems/new|create instance variables

cleaned admin/problems/edit|update instance variables

removed cancan, removed instance variables from toggle_active action

cleaned teacher/problems/index instance variables

teacher/problems index show new create actions working