handles reel csv file creation more subtly (creates new only when not existing and appends correctly to existing files)
handles reel csv file creation more subtly (creates new only when not existing and appends correctly to existing files)

jwestgard/newspaper-batchload,peichman-umd/newspaper-batchload,jwestgard/newspaper-batchload,peichman-umd/newspaper-batchload,umd-lib/newspaper-batchload,umd-lib/newspaper-batchload