add blueprint bytecode output

[charles-cooper]

What I did

add output format which deploys blueprint contracts

How I did it

futz around with codecopy

How to verify it

try vyper -f blueprint_bytecode <foo.vy>

Commit message

Description for the changelog

Cute Animal Picture

[codecov-commenter]

Codecov Report

Merging #3001 (cfdeee3) into master (f31f0ec) will decrease coverage by 0.21%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3001      +/-   ##
==========================================
- Coverage   88.29%   88.07%   -0.22%     
==========================================
  Files          97       97              
  Lines       10919    10928       +9     
  Branches     2583     2583              
==========================================
- Hits         9641     9625      -16     
- Misses        830      856      +26     
+ Partials      448      447       -1     

Impacted Files	Coverage Δ
vyper/cli/vyper_compile.py	68.14% <ø> (ø)
vyper/compiler/__init__.py	88.09% <ø> (ø)
vyper/compiler/output.py	89.00% <100.00%> (+0.11%)	⬆️
vyper/compiler/phases.py	90.99% <100.00%> (+0.60%)	⬆️
vyper/codegen/arithmetic.py	74.68% <0.00%> (-10.13%)	⬇️
vyper/builtin_functions/functions.py	89.64% <0.00%> (-0.76%)	⬇️

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