Done for MOVSX, MOVZX and SHR. Other instructions are useless.
Resolve conflicts
merge
Merge branch 'master' of github.com:dopl/bytecast-amd64

Conflicts:
	bytecast-amd64/test/edu/syr/bytecast/amd64/impl/decoder/CALLQInstructionDecoderTest.java
	bytecast-amd64/test/edu/syr/bytecast/amd64/impl/parser/InstructionTestUtils.java