extend chapter 2 peephole section (#118)

* extend peephole section

* fix bad indentatitons

* Update README.md

3 files changed, 241 insertions, 0 deletions

diff --git a/chapter02/docs/02-demonstration-peephole.svg b/chapter02/docs/02-demonstration-peephole.svg
new file mode 100644
index 00000000..90ab6ca4
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diff --git a/chapter02/docs/02-demonstration-pre-peephole-nokill.svg b/chapter02/docs/02-demonstration-pre-peephole-nokill.svg
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