Functionality to save error messages

The user can select a path to save the error and it also checks for
invalid student numbers
Merge pull request #52 from Serame/master

Functionality to save errors in a date named text file and also to detect invalid student numbers
Merge
Small changes to save error
Additional link

We just added a link  that allow users to go back to the login page
Additional link

We just added a link that allow users to return to the login page
Fix
Merge remote-tracking branch 'upstream/master'
before merge

before merge