Added new instructions.
# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
#
# Initial commit
#
# Changes to be committed:
#   (use "git rm --cached <file>..." to unstage)
#
#	new file:   AddInstruction.php
#	new file:   DualInstruction.php
#	new file:   Instruction.php
#	new file:   Interpreter.php
#	new file:   InterpreterTest.php
#	new file:   PrintInstruction.php
#	new file:   SetInstruction.php
#	new file:   SubInstruction.php
#	new file:   VariableOrLiteral.php
#