Merge pull request #48 from pelikanchik/alexg

reset password fix
add collecting and delivery of statistics
fixed KeyError, added try/except block
found another KeyError, fixed
added collecting and delivery of statistics of sections of courses
a little improvement
bug fix
Merge pull request #53 from pelikanchik/alexg

Alexg
Merge pull request #55 from pelikanchik/timur

Timur
fixed bug with math tags
bug fix
Merge pull request #57 from pelikanchik/timur

bug fix
correct redirects