Keep consistency
Fixed hyperlink
Updated README.md w/ec point total.
lecture notes
Update README.md
Updated hw4-contributing/README.md
Updated README.md files in assignments to include test script instructions.
removed the picture in shell-trickes
Added to fork, perror, and wait for hw 4, will do at least one more later and fix any writing errors
Removed unnecessary character in sample command and fixed grammar error
Added some new syscalls to check
Server Name Changed
Updated piping section for syscalls tutorial
Fixed the problem where the scripts like calcgrade and checksyscalls could not be run from any folder except script.
fixed dates for week 10 on README.md
Added Rough Draft Pull request info
added vim-videos tutorial
Grouped syscalls into different files

added a waitpid example