Documentation: remove instructions for hand-crafted installs from document_FreeEOS/release_figures/README.install_FreeEOS_versions
Scripts: Add installation of all old (Make-based and autotools-based) release versions to scripts/install_FreeEOS_versions.sh
Scripts: replace "yes" and "no" user responses with "y" and "n"
Update scripts/install_FreeEOS_versions.sh to define and use additional functions and install extra free_eos library versions
Build system: Disentangle BUILD_TEST, BUILD_papers, and BUILD_release_figures logic
Fix bug introduced in last commit and also fix trailing whitespace issues
Simplify 2.2.0 commentary
Document timing results that were calculated with a cleaner timing environment