selection, deletion
minor documentation change
readFile function in Parser
Merge: Added "else if"s and isIdentifier

Conflicts:
	Database Management System/Database.cpp
	Database Management System/Database.h
	Database Management System/Parser.cpp
Removed Arrows and Github stuff
query
Merge remote-tracking branch 'origin/garrett-branch'

Conflicts:
	Database Management System/Database.cpp
	Database Management System/Database.h
	Database Management System/Parser.cpp
Dat GitHub Arrows
Erased GitHub Arrows && changed Query