Merge pull request #1 from hasbel/Julian

Merge Julian in Master
Instructions NOT,AND, OR, XOR, REA, REO, REX and TB for SLL added
Merge pull request #2 from hans90/Johannes

Instructions NOT,AND, OR, XOR, REA, REO, REX and TB for SLL added
Fixed SLL_TB and added new tasks to the README.
Added ADD and SUB commands. Not sure about the flags though.
Merge branch 'master' of https://github.com/hasbel/VHDL-CPU-Functional

Conflicts:
	cpu_defs_pack_body.vhd
Added missing file to tcl script and some more description to code. Use this commit to update your branches.