ex 5.8 - new approach
legacy simu - dup label detection
simu - dup label detection
ex 5.8 - done
ex 5.10 - skipped
ex 5.13 - done
ex 5.11 - todo
ex 5.10 - new syntax design
ex 5.10 - copy instruction
ex 5.10 - call insn impl
ex 5.10 - legacy working
ex 5.10 - simu
ex 5.11.a - explained
ex 5.11.a - execute and verify
ex 5.8 - clean up some TODOs
Merge branch 'sicp'

Conflicts:
	sicp/ch05/exercise_5_8.scm
simu - decouple op syntax
ex 5.9 & ex 5.10 - apply interface change
ex 5.11.b - working on legacy
ex 5.11.b - legacy - good and working