v0.1.4

New features:

• Component levels report shows signal levels of bright and dark pixels
  in multiplex images.

Misc:

• Unmixing quality report works when DAPI and AF components are not present.
• consolidate_and_summarize_cell_seg_data processes files pairwise
  for reduced memory requirements.
• Better error handling in consolidate_and_summarize_cell_seg_data.
• Removed consolidate_and_split_cell_seg_data