Updated SysProg-Class and added 2-StudentDB

2-StudentDB/starter/a2-questions.md

2-StudentDB/starter/db.h

2-StudentDB/starter/dblayout.png

2-StudentDB/starter/makefile

2-StudentDB/starter/sdbsc

2-StudentDB/starter/sdbsc.c

2-StudentDB/starter/sdbsc.dSYM/Contents/Info.plist

...udentDB/starter/sdbsc.dSYM/Contents/Resources/DWARF/sdbsc

...dbsc.dSYM/Contents/Resources/Relocations/x86_64/sdbsc.yml

2-StudentDB/starter/sdbsc.h

2-StudentDB/starter/student.db

2-StudentDB/starter/test.sh

2-StudentDB/starter/testload.sh

SysProg-Class