Reset password functionality

[AndreySurzhan]

As User I would like to get ability to reset password

That would allow me to reset password if I forget my password to login the app

AC:

1. Button "Forgot passord?"
2. Page for entering mail:
   field "Enter email"
   the field should not be empty (error with an empty field)
   the field must check the validity of the email (error with invalid email)
   button "send"
3. Page fo change password:
   field "enter new password"
   the field should not be empty (error with an empty field)
   field "Confirm the password"
   the field should not be empty (error with an empty field)
   the field must contain the same characters as in the "enter new password" field
   button "accept"
   button "cancel"
4. API for sending letters with a link to the password change page