Custom delete behavior for Functions.  Completes #187.  Fixes #188
Warning and hiding the Transport Delay field for #43
Added migration for #43
Migrated the sample databases.  Closes #43
Safe handling of null transport delay PDFs as required by issue https://github.com/NAVADMC/SpreadModel/issues/43.
New Windows executable for issue https://github.com/NAVADMC/SpreadModel/issues/43.
Population delete link + confirmation.  Closes #194
Implemented #193 parts 1-3
Migration for #193
Started MtM widget for #193.  Fixed migration to allow no effect on Production Type.