multifix

[lorenzocorallo]

• downloaded 2021 rankings from original source to gain "matricola"
• fix [BUG] reparsing non funziona correttamente #91: re-parsing was not working (the function to Add and Merge the ranking to the set was not correctly handling the re-parsing)
• fix: temporary removed parallel in Parser methods because it was causing random data loss (need further investigation)
• refactor: merit and course creation moved to their own functions and simplified "matricola" discrimination
• finally fix [BUG] discrepanza tra immat.consentita e immat.corso #86 and discrepanza tra immat.consentita e immat.corso Rankings#84
• fix: for some reason rankings urls were including \\ instead / and it was braking the compare method
• fix: LinksFind.GetCombinationLinks now searches starting from 2021 (latest year online with "matricola" at the time the script was made)
• fix: canEnrollinto on course tables without "matricola" pointing to meritTable now are set to the courseTitle (I think that it was already done, but the script wasn't doing that, so idk)