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Updated sample command for assignment.

'&' not required to be handled for assignment.

Updated README.md

Accidentally deleted more characters than intended.

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Removed unnecessary character in sample command

Updated README.md

Accidentally deleted more characters than intended.

Update README.md

1: Checksyscalls takes in folder arguments(with or without trailing /) and goes recursively through all folders.
2: Modified the regular expressions so that open now does not match filestream member function like ifs.open("file").
3: Added sycalls ioctl, close and readlink to the list.

calcgrade fix

added lecture notes

made calcgrade work with github usernames