Finalize most viable REMARKS

[sbenthall]

Finalize these REMARKs:

• [ ] https://github.com/econ-ark/KrusellSmith
• [x] https://github.com/econ-ark/BlanchardPA2019
• [ ] https://github.com/econ-ark/CGMPortfolio
• [ ] https://github.com/econ-ark/PortfolioChoiceBlogPost
• [x] https://github.com/econ-ark/EndogenousRetirement
• [ ] https://github.com/econ-ark/BayerLuetticke

[sbenthall]

Currently, BlanchardPA2019 has been finalized.

The BayerLuettecke repository is ready, but finalization is blocked ambiguities in the metadata requirements #99

The other repositories are all for various reasons not up to the current REMARK standards. See each repo's issue tracker for outstanding issues.