Checklist for splitting sim-recon

1. Delete test versions of halld_recon and halld_sim on GitHub
2. Create blank repositories on GitHub
3. Fill the new directories
   • In any directory make $HD_UTILITIES_HOME/split_sim-recon/Makefile
4. Turn off write access for GlueX Team to sim-recon
5. Turn on write access for halld_recon and halld_sim
6. Tag versions of halld_recon and halld_sim (3.0.0 for both)
7. Merge "split_sim-recon" branches of hdgeant4 and gluex_root_analysis onto master branches
8. Tag new versions of hdgeant4 and gluex_root_analysis
9. Create new version set file (3.0)
10. Delete test versions of halld_recon and halld_sim
11. Build on five platforms
12. Change the default version file to the new one
13. Announce the change