v1.2.0

Added logging back.

Removed unnecessary miscellaneous scripts.

Added appendix source and new PDF.

Fixed order of Fix and Error columns in bug table within appendix.

Updated Rust submodule.

Created bug ID list for in-text references.

Updated submodule and added note about dataset embargo.

Added arxiv link.

Added a copy of the appendix.

Simplified Tree Borrows descriptions.

Updated build scripts and published dataset.

Removed extraneous ')'.

Updated submodule.

Ensured submodule for rllvm-as is initialized during build.