Minor fixes#2

Open

srevinsaju wants to merge 3 commits intoconorthedev:masterfrom

srevinsaju:fix-typeerrors

Commits on Oct 2, 2020

fix: Do not exit function if fetching only from the first classroom failed
srevinsaju
committed
fix: Do not attempt to check for assignments if empty courseWork
srevinsaju
committed
fix: fallback to empty string '' instead of NoneType if description is not provided on the assignment
srevinsaju
committed